Make the Error class constructor protected

This is forcing to use Error::success(), which is in a wide majority
of cases a lot more readable.

Differential Revision: https://reviews.llvm.org/D26481

llvm-svn: 286561
diff --git a/lldb/source/Commands/CommandObjectDisassemble.cpp b/lldb/source/Commands/CommandObjectDisassemble.cpp
index 0795033..6273744 100644
--- a/lldb/source/Commands/CommandObjectDisassemble.cpp
+++ b/lldb/source/Commands/CommandObjectDisassemble.cpp
@@ -231,7 +231,7 @@
     ExecutionContext *execution_context) {
   if (!some_location_specified)
     current_function = true;
-  return Error();
+  return Error::success();
 }
 
 llvm::ArrayRef<OptionDefinition>
diff --git a/lldb/source/Commands/CommandObjectExpression.cpp b/lldb/source/Commands/CommandObjectExpression.cpp
index ba477cd..d98a3ee 100644
--- a/lldb/source/Commands/CommandObjectExpression.cpp
+++ b/lldb/source/Commands/CommandObjectExpression.cpp
@@ -303,7 +303,7 @@
     return Error("as it does not refer to a pointer");
   if (pointee.IsVoidType())
     return Error("as it refers to a pointer to void");
-  return Error();
+  return Error::success();
 }
 
 bool CommandObjectExpression::EvaluateExpression(const char *expr,
diff --git a/lldb/source/Core/ModuleList.cpp b/lldb/source/Core/ModuleList.cpp
index b980e15..7ad1f09 100644
--- a/lldb/source/Core/ModuleList.cpp
+++ b/lldb/source/Core/ModuleList.cpp
@@ -788,7 +788,7 @@
               *did_create_ptr = true;
 
             shared_module_list.ReplaceEquivalent(module_sp);
-            return Error();
+            return Error::success();
           }
         }
       } else {
diff --git a/lldb/source/Host/common/NativeBreakpoint.cpp b/lldb/source/Host/common/NativeBreakpoint.cpp
index d61a2f5..a2cc048 100644
--- a/lldb/source/Host/common/NativeBreakpoint.cpp
+++ b/lldb/source/Host/common/NativeBreakpoint.cpp
@@ -53,7 +53,7 @@
       log->Printf("NativeBreakpoint::%s addr = 0x%" PRIx64
                   " already enabled, ignoring.",
                   __FUNCTION__, m_addr);
-    return Error();
+    return Error::success();
   }
 
   // Log and enable.
@@ -85,7 +85,7 @@
       log->Printf("NativeBreakpoint::%s addr = 0x%" PRIx64
                   " already disabled, ignoring.",
                   __FUNCTION__, m_addr);
-    return Error();
+    return Error::success();
   }
 
   // Log and disable.
diff --git a/lldb/source/Host/common/NativeBreakpointList.cpp b/lldb/source/Host/common/NativeBreakpointList.cpp
index df5bce8..58e1c3e 100644
--- a/lldb/source/Host/common/NativeBreakpointList.cpp
+++ b/lldb/source/Host/common/NativeBreakpointList.cpp
@@ -40,7 +40,7 @@
                   __FUNCTION__, addr);
 
     iter->second->AddRef();
-    return Error();
+    return Error::success();
   }
 
   // Create a new breakpoint using the given create func.
@@ -205,7 +205,7 @@
 
   // Disable it.
   breakpoint_sp = iter->second;
-  return Error();
+  return Error::success();
 }
 
 Error NativeBreakpointList::RemoveTrapsFromBuffer(lldb::addr_t addr, void *buf,
@@ -225,5 +225,5 @@
     auto opcode_size = software_bp_sp->m_opcode_size;
     ::memcpy(opcode_addr, saved_opcodes, opcode_size);
   }
-  return Error();
+  return Error::success();
 }
diff --git a/lldb/source/Host/common/NativeProcessProtocol.cpp b/lldb/source/Host/common/NativeProcessProtocol.cpp
index d77b8b2..a22d7f8 100644
--- a/lldb/source/Host/common/NativeProcessProtocol.cpp
+++ b/lldb/source/Host/common/NativeProcessProtocol.cpp
@@ -405,7 +405,7 @@
 
   arch = module_specs.GetModuleSpecRefAtIndex(0).GetArchitecture();
   if (arch.IsValid())
-    return Error();
+    return Error::success();
   else
     return Error("failed to retrieve a valid architecture from the exe module");
 }
diff --git a/lldb/source/Host/common/NativeWatchpointList.cpp b/lldb/source/Host/common/NativeWatchpointList.cpp
index 5948adf..be9d2eb 100644
--- a/lldb/source/Host/common/NativeWatchpointList.cpp
+++ b/lldb/source/Host/common/NativeWatchpointList.cpp
@@ -17,12 +17,12 @@
 Error NativeWatchpointList::Add(addr_t addr, size_t size, uint32_t watch_flags,
                                 bool hardware) {
   m_watchpoints[addr] = {addr, size, watch_flags, hardware};
-  return Error();
+  return Error::success();
 }
 
 Error NativeWatchpointList::Remove(addr_t addr) {
   m_watchpoints.erase(addr);
-  return Error();
+  return Error::success();
 }
 
 const NativeWatchpointList::WatchpointMap &
diff --git a/lldb/source/Host/common/SoftwareBreakpoint.cpp b/lldb/source/Host/common/SoftwareBreakpoint.cpp
index 3d57b7d..6cb8126 100644
--- a/lldb/source/Host/common/SoftwareBreakpoint.cpp
+++ b/lldb/source/Host/common/SoftwareBreakpoint.cpp
@@ -103,7 +103,7 @@
   // breakpoint.
   breakpoint_sp.reset(new SoftwareBreakpoint(process, addr, saved_opcode_bytes,
                                              bp_opcode_bytes, bp_opcode_size));
-  return Error();
+  return Error::success();
 }
 
 Error SoftwareBreakpoint::EnableSoftwareBreakpoint(
@@ -219,7 +219,7 @@
     log->Printf("SoftwareBreakpoint::%s addr = 0x%" PRIx64 " -- SUCCESS",
                 __FUNCTION__, addr);
 
-  return Error();
+  return Error::success();
 }
 
 // -------------------------------------------------------------------
diff --git a/lldb/source/Host/posix/FileSystem.cpp b/lldb/source/Host/posix/FileSystem.cpp
index aaa53ce..0567f60 100644
--- a/lldb/source/Host/posix/FileSystem.cpp
+++ b/lldb/source/Host/posix/FileSystem.cpp
@@ -62,7 +62,7 @@
       } break;
       case EEXIST: {
         if (file_spec.IsDirectory())
-          return Error(); // It is a directory and it already exists
+          return Error::success(); // It is a directory and it already exists
       } break;
       }
     }
@@ -210,7 +210,7 @@
 
   dst = FileSpec(real_path, false);
 
-  return Error();
+  return Error::success();
 }
 
 #if defined(__NetBSD__)
diff --git a/lldb/source/Host/posix/MainLoopPosix.cpp b/lldb/source/Host/posix/MainLoopPosix.cpp
index 08c969e..59a7612 100644
--- a/lldb/source/Host/posix/MainLoopPosix.cpp
+++ b/lldb/source/Host/posix/MainLoopPosix.cpp
@@ -160,7 +160,7 @@
       it->second.callback(*this); // Do the work
 
       if (m_terminate_request)
-        return Error();
+        return Error::success();
     }
 
     for (int fd : read_fds) {
@@ -175,8 +175,8 @@
       it->second(*this); // Do the work
 
       if (m_terminate_request)
-        return Error();
+        return Error::success();
     }
   }
-  return Error();
+  return Error::success();
 }
diff --git a/lldb/source/Host/posix/PipePosix.cpp b/lldb/source/Host/posix/PipePosix.cpp
index 4e0810c..142f6c9 100644
--- a/lldb/source/Host/posix/PipePosix.cpp
+++ b/lldb/source/Host/posix/PipePosix.cpp
@@ -206,7 +206,7 @@
     }
   }
 
-  return Error();
+  return Error::success();
 }
 
 int PipePosix::GetReadFileDescriptor() const { return m_fds[READ]; }
diff --git a/lldb/source/Host/windows/LockFileWindows.cpp b/lldb/source/Host/windows/LockFileWindows.cpp
index 0e7f595..11096bc 100644
--- a/lldb/source/Host/windows/LockFileWindows.cpp
+++ b/lldb/source/Host/windows/LockFileWindows.cpp
@@ -31,7 +31,7 @@
   if (!::GetOverlappedResult(file_handle, &overlapped, &bytes, TRUE))
     return Error(::GetLastError(), eErrorTypeWin32);
 
-  return Error();
+  return Error::success();
 }
 
 } // namespace
@@ -74,5 +74,5 @@
   if (!::GetOverlappedResult(m_file, &overlapped, &bytes, TRUE))
     return Error(::GetLastError(), eErrorTypeWin32);
 
-  return Error();
+  return Error::success();
 }
diff --git a/lldb/source/Host/windows/PipeWindows.cpp b/lldb/source/Host/windows/PipeWindows.cpp
index 407f046..64b6584 100644
--- a/lldb/source/Host/windows/PipeWindows.cpp
+++ b/lldb/source/Host/windows/PipeWindows.cpp
@@ -161,7 +161,7 @@
     ZeroMemory(&m_write_overlapped, sizeof(m_write_overlapped));
   }
 
-  return Error();
+  return Error::success();
 }
 
 int PipeWindows::GetReadFileDescriptor() const { return m_read_fd; }
@@ -217,7 +217,7 @@
   CloseWriteFileDescriptor();
 }
 
-Error PipeWindows::Delete(llvm::StringRef name) { return Error(); }
+Error PipeWindows::Delete(llvm::StringRef name) { return Error::success(); }
 
 bool PipeWindows::CanRead() const { return (m_read != INVALID_HANDLE_VALUE); }
 
@@ -273,7 +273,7 @@
     return Error(::GetLastError(), eErrorTypeWin32);
 
   bytes_read = sys_bytes_read;
-  return Error();
+  return Error::success();
 }
 
 Error PipeWindows::Write(const void *buf, size_t num_bytes,
@@ -291,5 +291,5 @@
                                     &sys_bytes_written, TRUE);
   if (!result)
     return Error(::GetLastError(), eErrorTypeWin32);
-  return Error();
+  return Error::success();
 }
diff --git a/lldb/source/Interpreter/OptionGroupVariable.cpp b/lldb/source/Interpreter/OptionGroupVariable.cpp
index c257506..a3150d1 100644
--- a/lldb/source/Interpreter/OptionGroupVariable.cpp
+++ b/lldb/source/Interpreter/OptionGroupVariable.cpp
@@ -59,13 +59,13 @@
   if (DataVisualization::NamedSummaryFormats::GetSummaryFormat(
           ConstString(str), summary_sp) == false)
     return Error("must specify a valid named summary");
-  return Error();
+  return Error::success();
 }
 
 static Error ValidateSummaryString(const char *str, void *) {
   if (!str || !str[0])
     return Error("must specify a non-empty summary string");
-  return Error();
+  return Error::success();
 }
 
 OptionGroupVariable::OptionGroupVariable(bool show_frame_options)
diff --git a/lldb/source/Interpreter/OptionValueString.cpp b/lldb/source/Interpreter/OptionValueString.cpp
index e61ead0..b5ce38c 100644
--- a/lldb/source/Interpreter/OptionValueString.cpp
+++ b/lldb/source/Interpreter/OptionValueString.cpp
@@ -133,7 +133,7 @@
       return error;
   }
   m_current_value.assign(value);
-  return Error();
+  return Error::success();
 }
 
 Error OptionValueString::AppendToCurrentValue(const char *value) {
@@ -148,5 +148,5 @@
     } else
       m_current_value.append(value);
   }
-  return Error();
+  return Error::success();
 }
diff --git a/lldb/source/Plugins/DynamicLoader/Hexagon-DYLD/DynamicLoaderHexagonDYLD.cpp b/lldb/source/Plugins/DynamicLoader/Hexagon-DYLD/DynamicLoaderHexagonDYLD.cpp
index fcbba93..73c3cca 100644
--- a/lldb/source/Plugins/DynamicLoader/Hexagon-DYLD/DynamicLoaderHexagonDYLD.cpp
+++ b/lldb/source/Plugins/DynamicLoader/Hexagon-DYLD/DynamicLoaderHexagonDYLD.cpp
@@ -213,7 +213,7 @@
 }
 
 // AD: Needs to be updated?
-Error DynamicLoaderHexagonDYLD::CanLoadImage() { return Error(); }
+Error DynamicLoaderHexagonDYLD::CanLoadImage() { return Error::success(); }
 
 void DynamicLoaderHexagonDYLD::UpdateLoadedSections(ModuleSP module,
                                                     addr_t link_map_addr,
diff --git a/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp b/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
index 8678f61..9af4646 100644
--- a/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
+++ b/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
@@ -221,7 +221,7 @@
   }
 }
 
-Error DynamicLoaderPOSIXDYLD::CanLoadImage() { return Error(); }
+Error DynamicLoaderPOSIXDYLD::CanLoadImage() { return Error::success(); }
 
 void DynamicLoaderPOSIXDYLD::UpdateLoadedSections(ModuleSP module,
                                                   addr_t link_map_addr,
diff --git a/lldb/source/Plugins/DynamicLoader/Windows-DYLD/DynamicLoaderWindowsDYLD.cpp b/lldb/source/Plugins/DynamicLoader/Windows-DYLD/DynamicLoaderWindowsDYLD.cpp
index 20bf360..09ed903 100644
--- a/lldb/source/Plugins/DynamicLoader/Windows-DYLD/DynamicLoaderWindowsDYLD.cpp
+++ b/lldb/source/Plugins/DynamicLoader/Windows-DYLD/DynamicLoaderWindowsDYLD.cpp
@@ -61,7 +61,7 @@
 
 void DynamicLoaderWindowsDYLD::DidLaunch() {}
 
-Error DynamicLoaderWindowsDYLD::CanLoadImage() { return Error(); }
+Error DynamicLoaderWindowsDYLD::CanLoadImage() { return Error::success(); }
 
 ConstString DynamicLoaderWindowsDYLD::GetPluginName() {
   return GetPluginNameStatic();
diff --git a/lldb/source/Plugins/Platform/Android/AdbClient.cpp b/lldb/source/Plugins/Platform/Android/AdbClient.cpp
index 79ad8f5..592bc84 100644
--- a/lldb/source/Plugins/Platform/Android/AdbClient.cpp
+++ b/lldb/source/Plugins/Platform/Android/AdbClient.cpp
@@ -381,7 +381,7 @@
                    std::string(output_buf.begin(), output_buf.end()).c_str());
   }
 
-  return Error();
+  return Error::success();
 }
 
 Error AdbClient::Shell(const char *command, uint32_t timeout_ms,
@@ -412,7 +412,7 @@
   dst.close();
   if (!dst)
     return Error("Failed to write file %s", output_filename.c_str());
-  return Error();
+  return Error::success();
 }
 
 std::unique_ptr<AdbClient::SyncService>
@@ -536,7 +536,7 @@
   mode = extractor.GetU32(&offset);
   size = extractor.GetU32(&offset);
   mtime = extractor.GetU32(&offset);
-  return Error();
+  return Error::success();
 }
 
 Error AdbClient::SyncService::PullFile(const FileSpec &remote_file,
@@ -641,7 +641,7 @@
   } else
     return Error("Pull failed with unknown response: %s", response_id.c_str());
 
-  return Error();
+  return Error::success();
 }
 
 Error AdbClient::SyncService::ReadAllBytes(void *buffer, size_t size) {
diff --git a/lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp b/lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp
index a870929..43720c0 100644
--- a/lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp
+++ b/lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp
@@ -252,7 +252,7 @@
 
   // Default to the local case
   local_file = platform_file;
-  return Error();
+  return Error::success();
 }
 
 //------------------------------------------------------------------
diff --git a/lldb/source/Plugins/Platform/Kalimba/PlatformKalimba.cpp b/lldb/source/Plugins/Platform/Kalimba/PlatformKalimba.cpp
index 69f5c29..017a1bf 100644
--- a/lldb/source/Plugins/Platform/Kalimba/PlatformKalimba.cpp
+++ b/lldb/source/Plugins/Platform/Kalimba/PlatformKalimba.cpp
@@ -179,7 +179,7 @@
 Error PlatformKalimba::GetFileWithUUID(const FileSpec & /*platform_file*/,
                                        const UUID * /*uuid_ptr*/,
                                        FileSpec & /*local_file*/) {
-  return Error();
+  return Error::success();
 }
 
 //------------------------------------------------------------------
diff --git a/lldb/source/Plugins/Platform/Linux/PlatformLinux.cpp b/lldb/source/Plugins/Platform/Linux/PlatformLinux.cpp
index 5b6bc35..b8fae14 100644
--- a/lldb/source/Plugins/Platform/Linux/PlatformLinux.cpp
+++ b/lldb/source/Plugins/Platform/Linux/PlatformLinux.cpp
@@ -341,7 +341,7 @@
 
   // Default to the local case
   local_file = platform_file;
-  return Error();
+  return Error::success();
 }
 
 //------------------------------------------------------------------
diff --git a/lldb/source/Plugins/Platform/MacOSX/PlatformAppleSimulator.cpp b/lldb/source/Plugins/Platform/MacOSX/PlatformAppleSimulator.cpp
index e6da63e..0b5d394 100644
--- a/lldb/source/Plugins/Platform/MacOSX/PlatformAppleSimulator.cpp
+++ b/lldb/source/Plugins/Platform/MacOSX/PlatformAppleSimulator.cpp
@@ -71,7 +71,7 @@
 
   if (spawned) {
     launch_info.SetProcessID(spawned.GetPID());
-    return Error();
+    return Error::success();
   } else
     return spawned.GetError();
 #else
@@ -164,7 +164,7 @@
 Error PlatformAppleSimulator::DisconnectRemote() {
 #if defined(__APPLE__)
   m_device.reset();
-  return Error();
+  return Error::success();
 #else
   Error err;
   err.SetErrorString(UNSUPPORTED_ERROR);
diff --git a/lldb/source/Plugins/Platform/MacOSX/PlatformDarwin.cpp b/lldb/source/Plugins/Platform/MacOSX/PlatformDarwin.cpp
index a92a8da..8cecd38 100644
--- a/lldb/source/Plugins/Platform/MacOSX/PlatformDarwin.cpp
+++ b/lldb/source/Plugins/Platform/MacOSX/PlatformDarwin.cpp
@@ -393,7 +393,7 @@
                                 module_spec.GetArchitecture());
           module_sp.reset(new Module(local_spec));
           module_sp->SetPlatformFileSpec(module_spec.GetFileSpec());
-          return Error();
+          return Error::success();
         }
       }
 
@@ -433,7 +433,7 @@
                       (IsHost() ? "host" : "remote"),
                       module_spec.GetFileSpec().GetDirectory().AsCString(),
                       module_spec.GetFileSpec().GetFilename().AsCString());
-        return Error();
+        return Error::success();
       }
 
       // bring in the remote module file
@@ -455,7 +455,7 @@
         ModuleSpec local_spec(module_cache_spec, module_spec.GetArchitecture());
         module_sp.reset(new Module(local_spec));
         module_sp->SetPlatformFileSpec(module_spec.GetFileSpec());
-        return Error();
+        return Error::success();
       } else
         return Error("unable to obtain valid module file");
     } else
diff --git a/lldb/source/Plugins/Platform/MacOSX/PlatformMacOSX.cpp b/lldb/source/Plugins/Platform/MacOSX/PlatformMacOSX.cpp
index 89b61bf..c506302 100644
--- a/lldb/source/Plugins/Platform/MacOSX/PlatformMacOSX.cpp
+++ b/lldb/source/Plugins/Platform/MacOSX/PlatformMacOSX.cpp
@@ -247,7 +247,7 @@
 
   // Default to the local case
   local_file = platform_file;
-  return Error();
+  return Error::success();
 }
 
 lldb_private::Error
@@ -264,7 +264,7 @@
     if (local_os_build.compare(remote_os_build) == 0) {
       // same OS version: the local file is good enough
       local_file = platform_file;
-      return Error();
+      return Error::success();
     } else {
       // try to find the file in the cache
       std::string cache_path(GetLocalCacheDirectory());
@@ -273,7 +273,7 @@
       FileSpec module_cache_spec(cache_path, false);
       if (module_cache_spec.Exists()) {
         local_file = module_cache_spec;
-        return Error();
+        return Error::success();
       }
       // bring in the remote module file
       FileSpec module_cache_folder =
@@ -288,13 +288,13 @@
         return err;
       if (module_cache_spec.Exists()) {
         local_file = module_cache_spec;
-        return Error();
+        return Error::success();
       } else
         return Error("unable to obtain valid module file");
     }
   }
   local_file = platform_file;
-  return Error();
+  return Error::success();
 }
 
 bool PlatformMacOSX::GetSupportedArchitectureAtIndex(uint32_t idx,
diff --git a/lldb/source/Plugins/Platform/NetBSD/PlatformNetBSD.cpp b/lldb/source/Plugins/Platform/NetBSD/PlatformNetBSD.cpp
index cb3c124..b7fa7aa 100644
--- a/lldb/source/Plugins/Platform/NetBSD/PlatformNetBSD.cpp
+++ b/lldb/source/Plugins/Platform/NetBSD/PlatformNetBSD.cpp
@@ -244,7 +244,7 @@
 
   // Default to the local case
   local_file = platform_file;
-  return Error();
+  return Error::success();
 }
 
 //------------------------------------------------------------------
diff --git a/lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp b/lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp
index b751de7..100500f 100644
--- a/lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp
+++ b/lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp
@@ -207,7 +207,7 @@
 
   if (IsHost()) {
     if (FileSpec::Equal(source, destination, true))
-      return Error();
+      return Error::success();
     // cp src dst
     // chown uid:gid dst
     std::string src_path(source.GetPath());
@@ -223,10 +223,10 @@
     if (status != 0)
       return Error("unable to perform copy");
     if (uid == UINT32_MAX && gid == UINT32_MAX)
-      return Error();
+      return Error::success();
     if (chown_file(this, dst_path.c_str(), uid, gid) != 0)
       return Error("unable to perform chown");
-    return Error();
+    return Error::success();
   } else if (m_remote_platform_sp) {
     if (GetSupportsRSync()) {
       std::string src_path(source.GetPath());
@@ -254,7 +254,7 @@
         // Don't chown a local file for a remote system
         //                if (chown_file(this,dst_path.c_str(),uid,gid) != 0)
         //                    return Error("unable to perform chown");
-        return Error();
+        return Error::success();
       }
       // if we are still here rsync has failed - let's try the slow way before
       // giving up
@@ -323,7 +323,7 @@
     RunShellCommand(cp_command.GetData(), NULL, &status, NULL, NULL, 10);
     if (status != 0)
       return Error("unable to perform copy");
-    return Error();
+    return Error::success();
   } else if (m_remote_platform_sp) {
     if (GetSupportsRSync()) {
       StreamString command;
@@ -343,7 +343,7 @@
       int retcode;
       Host::RunShellCommand(command.GetData(), NULL, &retcode, NULL, NULL, 60);
       if (retcode == 0)
-        return Error();
+        return Error::success();
       // If we are here, rsync has failed - let's try the slow way before giving
       // up
     }
@@ -745,7 +745,7 @@
 
   if (result_valobj_sp->GetError().Fail())
     return result_valobj_sp->GetError();
-  return Error();
+  return Error::success();
 }
 
 uint32_t PlatformPOSIX::DoLoadImage(lldb_private::Process *process,
@@ -833,7 +833,7 @@
       return Error("expression failed: \"%s\"", expr.GetData());
     process->ResetImageToken(image_token);
   }
-  return Error();
+  return Error::success();
 }
 
 lldb::ProcessSP PlatformPOSIX::ConnectProcess(const char *connect_url,
diff --git a/lldb/source/Plugins/Platform/Windows/PlatformWindows.cpp b/lldb/source/Plugins/Platform/Windows/PlatformWindows.cpp
index d25bb7b..534c773 100644
--- a/lldb/source/Plugins/Platform/Windows/PlatformWindows.cpp
+++ b/lldb/source/Plugins/Platform/Windows/PlatformWindows.cpp
@@ -527,7 +527,7 @@
 
   // Default to the local case
   local_file = platform_file;
-  return Error();
+  return Error::success();
 }
 
 Error PlatformWindows::GetSharedModule(
diff --git a/lldb/source/Plugins/Platform/gdb-server/PlatformRemoteGDBServer.cpp b/lldb/source/Plugins/Platform/gdb-server/PlatformRemoteGDBServer.cpp
index 8b9972f..007ce1a 100644
--- a/lldb/source/Plugins/Platform/gdb-server/PlatformRemoteGDBServer.cpp
+++ b/lldb/source/Plugins/Platform/gdb-server/PlatformRemoteGDBServer.cpp
@@ -196,7 +196,7 @@
                                                FileSpec &local_file) {
   // Default to the local case
   local_file = platform_file;
-  return Error();
+  return Error::success();
 }
 
 //------------------------------------------------------------------
@@ -482,7 +482,7 @@
 Error PlatformRemoteGDBServer::KillProcess(const lldb::pid_t pid) {
   if (!KillSpawnedProcess(pid))
     return Error("failed to kill remote spawned process");
-  return Error();
+  return Error::success();
 }
 
 lldb::ProcessSP PlatformRemoteGDBServer::DebugProcess(
diff --git a/lldb/source/Plugins/Process/FreeBSD/ProcessFreeBSD.cpp b/lldb/source/Plugins/Process/FreeBSD/ProcessFreeBSD.cpp
index 82e45a5..7680dfe 100644
--- a/lldb/source/Plugins/Process/FreeBSD/ProcessFreeBSD.cpp
+++ b/lldb/source/Plugins/Process/FreeBSD/ProcessFreeBSD.cpp
@@ -150,7 +150,7 @@
   else
     m_monitor->Resume(GetID(), m_resume_signo);
 
-  return Error();
+  return Error::success();
 }
 
 bool ProcessFreeBSD::UpdateThreadList(ThreadList &old_thread_list,
diff --git a/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
index 8494077..7a3696a 100644
--- a/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
@@ -1364,13 +1364,13 @@
   // If setting the breakpoint fails because next_pc is out of
   // the address space, ignore it and let the debugee segfault.
   if (error.GetError() == EIO || error.GetError() == EFAULT) {
-    return Error();
+    return Error::success();
   } else if (error.Fail())
     return error;
 
   m_threads_stepping_with_breakpoint.insert({thread.GetID(), next_pc});
 
-  return Error();
+  return Error::success();
 }
 
 bool NativeProcessLinux::SupportHardwareSingleStepping() const {
@@ -1453,7 +1453,7 @@
     }
   }
 
-  return Error();
+  return Error::success();
 }
 
 Error NativeProcessLinux::Halt() {
@@ -1553,7 +1553,7 @@
 
   StopRunningThreads(deferred_signal_thread_sp->GetID());
 
-  return Error();
+  return Error::success();
 }
 
 Error NativeProcessLinux::Kill() {
@@ -1677,7 +1677,7 @@
   if (name)
     memory_region_info.SetName(name);
 
-  return Error();
+  return Error::success();
 }
 
 Error NativeProcessLinux::GetMemoryRegionInfo(lldb::addr_t load_addr,
@@ -1841,7 +1841,7 @@
   if (InferiorCallMmap(this, addr, 0, size, prot,
                        eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) {
     m_addr_to_mmap_size[addr] = size;
-    return Error();
+    return Error::success();
   } else {
     addr = LLDB_INVALID_ADDRESS;
     return Error("unable to allocate %" PRIu64
@@ -1886,11 +1886,11 @@
   case llvm::Triple::x86:
   case llvm::Triple::x86_64:
     actual_opcode_size = static_cast<uint32_t>(sizeof(g_i386_opcode));
-    return Error();
+    return Error::success();
 
   case llvm::Triple::systemz:
     actual_opcode_size = static_cast<uint32_t>(sizeof(g_s390x_opcode));
-    return Error();
+    return Error::success();
 
   case llvm::Triple::arm:
   case llvm::Triple::aarch64:
@@ -1900,7 +1900,7 @@
   case llvm::Triple::mipsel:
     // On these architectures the PC don't get updated for breakpoint hits
     actual_opcode_size = 0;
-    return Error();
+    return Error::success();
 
   default:
     assert(false && "CPU type not supported!");
@@ -1935,18 +1935,18 @@
   case llvm::Triple::aarch64:
     trap_opcode_bytes = g_aarch64_opcode;
     actual_opcode_size = sizeof(g_aarch64_opcode);
-    return Error();
+    return Error::success();
 
   case llvm::Triple::arm:
     switch (trap_opcode_size_hint) {
     case 2:
       trap_opcode_bytes = g_thumb_breakpoint_opcode;
       actual_opcode_size = sizeof(g_thumb_breakpoint_opcode);
-      return Error();
+      return Error::success();
     case 4:
       trap_opcode_bytes = g_arm_breakpoint_opcode;
       actual_opcode_size = sizeof(g_arm_breakpoint_opcode);
-      return Error();
+      return Error::success();
     default:
       assert(false && "Unrecognised trap opcode size hint!");
       return Error("Unrecognised trap opcode size hint!");
@@ -1956,24 +1956,24 @@
   case llvm::Triple::x86_64:
     trap_opcode_bytes = g_i386_opcode;
     actual_opcode_size = sizeof(g_i386_opcode);
-    return Error();
+    return Error::success();
 
   case llvm::Triple::mips:
   case llvm::Triple::mips64:
     trap_opcode_bytes = g_mips64_opcode;
     actual_opcode_size = sizeof(g_mips64_opcode);
-    return Error();
+    return Error::success();
 
   case llvm::Triple::mipsel:
   case llvm::Triple::mips64el:
     trap_opcode_bytes = g_mips64el_opcode;
     actual_opcode_size = sizeof(g_mips64el_opcode);
-    return Error();
+    return Error::success();
 
   case llvm::Triple::systemz:
     trap_opcode_bytes = g_s390x_opcode;
     actual_opcode_size = sizeof(g_s390x_opcode);
-    return Error();
+    return Error::success();
 
   default:
     assert(false && "CPU type not supported!");
@@ -2156,7 +2156,7 @@
                   success ? "Success" : strerror(errno));
 
     if (success)
-      return Error();
+      return Error::success();
     // else
     //     the call failed for some reason, let's retry the read using ptrace
     //     api.
@@ -2207,7 +2207,7 @@
 
   if (log)
     ProcessPOSIXLog::DecNestLevel();
-  return Error();
+  return Error::success();
 }
 
 Error NativeProcessLinux::ReadMemoryWithoutTrap(lldb::addr_t addr, void *buf,
@@ -2303,7 +2303,7 @@
 
 Error NativeProcessLinux::Detach(lldb::tid_t tid) {
   if (tid == LLDB_INVALID_THREAD_ID)
-    return Error();
+    return Error::success();
 
   return PtraceWrapper(PTRACE_DETACH, tid);
 }
@@ -2414,7 +2414,7 @@
           "NativeProcessLinux::%s pid %" PRIu64
           " no lldb breakpoint found at current pc with adjustment: 0x%" PRIx64,
           __FUNCTION__, GetID(), breakpoint_addr);
-    return Error();
+    return Error::success();
   }
 
   // If the breakpoint is not a software breakpoint, nothing to do.
@@ -2424,7 +2424,7 @@
                   " breakpoint found at 0x%" PRIx64
                   ", not software, nothing to adjust",
                   __FUNCTION__, GetID(), breakpoint_addr);
-    return Error();
+    return Error::success();
   }
 
   //
@@ -2440,7 +2440,7 @@
           " breakpoint found at 0x%" PRIx64
           ", it is software, but the size is zero, nothing to do (unexpected)",
           __FUNCTION__, GetID(), breakpoint_addr);
-    return Error();
+    return Error::success();
   }
 
   // Change the program counter.
@@ -2488,7 +2488,7 @@
     return Error("Module file (%s) not found in /proc/%" PRIu64 "/maps file!",
                  module_file_spec.GetFilename().AsCString(), GetID());
 
-  return Error();
+  return Error::success();
 }
 
 Error NativeProcessLinux::GetFileLoadAddress(const llvm::StringRef &file_name,
diff --git a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.cpp b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.cpp
index 9e85713..4566493 100644
--- a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.cpp
@@ -263,7 +263,7 @@
     if (error.Fail())
       return error;
 
-    return Error();
+    return Error::success();
   }
 
   return Error("failed - register wasn't recognized to be a GPR or an FPR, "
@@ -679,7 +679,7 @@
     }
   }
 
-  return Error();
+  return Error::success();
 }
 
 uint32_t NativeRegisterContextLinux_arm::GetWatchpointSize(uint32_t wp_index) {
@@ -730,12 +730,12 @@
     if (WatchpointIsEnabled(wp_index) && trap_addr >= watch_addr &&
         trap_addr < watch_addr + watch_size) {
       m_hwp_regs[wp_index].hit_addr = trap_addr;
-      return Error();
+      return Error::success();
     }
   }
 
   wp_index = LLDB_INVALID_INDEX32;
-  return Error();
+  return Error::success();
 }
 
 lldb::addr_t
@@ -774,7 +774,7 @@
   Error error;
 
   if (!m_refresh_hwdebug_info) {
-    return Error();
+    return Error::success();
   }
 
   unsigned int cap_val;
@@ -862,7 +862,7 @@
     return error;
 
   value.SetUInt32(m_gpr_arm[offset / sizeof(uint32_t)]);
-  return Error();
+  return Error::success();
 }
 
 Error NativeRegisterContextLinux_arm::DoWriteRegisterValue(
diff --git a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
index cb0700d..c0fdb74 100644
--- a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
@@ -276,7 +276,7 @@
     if (error.Fail())
       return error;
 
-    return Error();
+    return Error::success();
   }
 
   return Error("failed - register wasn't recognized to be a GPR or an FPR, "
@@ -671,7 +671,7 @@
     }
   }
 
-  return Error();
+  return Error::success();
 }
 
 uint32_t
@@ -722,12 +722,12 @@
     if (WatchpointIsEnabled(wp_index) && trap_addr >= watch_addr &&
         trap_addr < watch_addr + watch_size) {
       m_hwp_regs[wp_index].hit_addr = trap_addr;
-      return Error();
+      return Error::success();
     }
   }
 
   wp_index = LLDB_INVALID_INDEX32;
-  return Error();
+  return Error::success();
 }
 
 lldb::addr_t
@@ -764,7 +764,7 @@
 
 Error NativeRegisterContextLinux_arm64::ReadHardwareDebugInfo() {
   if (!m_refresh_hwdebug_info) {
-    return Error();
+    return Error::success();
   }
 
   ::pid_t tid = m_thread.GetID();
diff --git a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_mips64.cpp b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_mips64.cpp
index c050a2e..bbd4578 100644
--- a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_mips64.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_mips64.cpp
@@ -932,7 +932,7 @@
     }
   }
   wp_index = LLDB_INVALID_INDEX32;
-  return Error();
+  return Error::success();
 }
 
 Error NativeRegisterContextLinux_mips64::IsWatchpointVacant(uint32_t wp_index,
diff --git a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_s390x.cpp b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_s390x.cpp
index 7ec4dc5..105fa9b 100644
--- a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_s390x.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_s390x.cpp
@@ -222,7 +222,7 @@
       assert(false && "Unhandled data size.");
       return Error("unhandled byte size: %" PRIu32, reg_info->byte_size);
     }
-    return Error();
+    return Error::success();
   }
 
   if (IsFPR(reg)) {
@@ -245,7 +245,7 @@
       assert(false && "Unhandled data size.");
       return Error("unhandled byte size: %" PRIu32, reg_info->byte_size);
     }
-    return Error();
+    return Error::success();
   }
 
   if (reg == lldb_last_break_s390x) {
@@ -255,7 +255,7 @@
       return error;
 
     reg_value.SetUInt64(last_break);
-    return Error();
+    return Error::success();
   }
 
   if (reg == lldb_system_call_s390x) {
@@ -265,7 +265,7 @@
       return error;
 
     reg_value.SetUInt32(system_call);
-    return Error();
+    return Error::success();
   }
 
   return Error("failed - register wasn't recognized");
@@ -511,7 +511,7 @@
 
   if (m_watchpoint_addr == LLDB_INVALID_ADDRESS) {
     is_hit = false;
-    return Error();
+    return Error::success();
   }
 
   Error error = PeekUserArea(offsetof(user_regs_struct, per_info.lowcore),
@@ -531,7 +531,7 @@
                  sizeof(per_lowcore));
   }
 
-  return Error();
+  return Error::success();
 }
 
 Error NativeRegisterContextLinux_s390x::GetWatchpointHitIndex(
@@ -548,7 +548,7 @@
     }
   }
   wp_index = LLDB_INVALID_INDEX32;
-  return Error();
+  return Error::success();
 }
 
 Error NativeRegisterContextLinux_s390x::IsWatchpointVacant(uint32_t wp_index,
@@ -558,7 +558,7 @@
 
   is_vacant = m_watchpoint_addr == LLDB_INVALID_ADDRESS;
 
-  return Error();
+  return Error::success();
 }
 
 bool NativeRegisterContextLinux_s390x::ClearHardwareWatchpoint(
@@ -589,7 +589,7 @@
 
 Error NativeRegisterContextLinux_s390x::ClearAllHardwareWatchpoints() {
   if (ClearHardwareWatchpoint(0))
-    return Error();
+    return Error::success();
   return Error("Clearing all hardware watchpoints failed.");
 }
 
diff --git a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_x86_64.cpp b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_x86_64.cpp
index 37e748d..e9bc296 100644
--- a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_x86_64.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_x86_64.cpp
@@ -626,7 +626,7 @@
       if (!CopyMPXtoXSTATE(reg_index))
         return Error("CopyMPXtoXSTATE() failed");
     }
-    return Error();
+    return Error::success();
   }
   return Error("failed - register wasn't recognized to be a GPR or an FPR, "
                "write strategy unknown");
@@ -1035,7 +1035,7 @@
     }
   }
   wp_index = LLDB_INVALID_INDEX32;
-  return Error();
+  return Error::success();
 }
 
 Error NativeRegisterContextLinux_x86_64::IsWatchpointVacant(uint32_t wp_index,
diff --git a/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp
index d18d3c1..6b4426b 100644
--- a/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp
@@ -167,7 +167,7 @@
   if (!hardware)
     return Error("not implemented");
   if (m_state == eStateLaunching)
-    return Error();
+    return Error::success();
   Error error = RemoveWatchpoint(addr);
   if (error.Fail())
     return error;
@@ -176,17 +176,17 @@
   if (wp_index == LLDB_INVALID_INDEX32)
     return Error("Setting hardware watchpoint failed.");
   m_watchpoint_index_map.insert({addr, wp_index});
-  return Error();
+  return Error::success();
 }
 
 Error NativeThreadLinux::RemoveWatchpoint(lldb::addr_t addr) {
   auto wp = m_watchpoint_index_map.find(addr);
   if (wp == m_watchpoint_index_map.end())
-    return Error();
+    return Error::success();
   uint32_t wp_index = wp->second;
   m_watchpoint_index_map.erase(wp);
   if (GetRegisterContext()->ClearHardwareWatchpoint(wp_index))
-    return Error();
+    return Error::success();
   return Error("Clearing hardware watchpoint failed.");
 }
 
diff --git a/lldb/source/Plugins/Process/MacOSX-Kernel/ProcessKDP.cpp b/lldb/source/Plugins/Process/MacOSX-Kernel/ProcessKDP.cpp
index 77b9fc8..2decd29 100644
--- a/lldb/source/Plugins/Process/MacOSX-Kernel/ProcessKDP.cpp
+++ b/lldb/source/Plugins/Process/MacOSX-Kernel/ProcessKDP.cpp
@@ -414,7 +414,7 @@
   return m_dyld_ap.get();
 }
 
-Error ProcessKDP::WillResume() { return Error(); }
+Error ProcessKDP::WillResume() { return Error::success(); }
 
 Error ProcessKDP::DoResume() {
   Error error;
diff --git a/lldb/source/Plugins/Process/Windows/Live/ProcessWindowsLive.cpp b/lldb/source/Plugins/Process/Windows/Live/ProcessWindowsLive.cpp
index 7ddc586..8fe93fa 100644
--- a/lldb/source/Plugins/Process/Windows/Live/ProcessWindowsLive.cpp
+++ b/lldb/source/Plugins/Process/Windows/Live/ProcessWindowsLive.cpp
@@ -427,7 +427,7 @@
           WINDOWS_LOG_PROCESS,
           "DoDetach called while state = %u, but there is no active session.",
           private_state);
-      return Error();
+      return Error::success();
     }
 
     debugger_thread = m_session_data->m_debugger;
@@ -477,7 +477,7 @@
           WINDOWS_LOG_PROCESS,
           "DoDestroy called while state = %u, but there is no active session.",
           private_state);
-      return Error();
+      return Error::success();
     }
 
     debugger_thread = m_session_data->m_debugger;
diff --git a/lldb/source/Plugins/Process/Windows/MiniDump/ProcessWinMiniDump.cpp b/lldb/source/Plugins/Process/Windows/MiniDump/ProcessWinMiniDump.cpp
index 128c4c1..5aaeb98 100644
--- a/lldb/source/Plugins/Process/Windows/MiniDump/ProcessWinMiniDump.cpp
+++ b/lldb/source/Plugins/Process/Windows/MiniDump/ProcessWinMiniDump.cpp
@@ -587,7 +587,7 @@
   return m_impl_up->RefreshStateAfterStop();
 }
 
-Error ProcessWinMiniDump::DoDestroy() { return Error(); }
+Error ProcessWinMiniDump::DoDestroy() { return Error::success(); }
 
 bool ProcessWinMiniDump::IsAlive() { return true; }
 
diff --git a/lldb/source/Plugins/Process/elf-core/ProcessElfCore.cpp b/lldb/source/Plugins/Process/elf-core/ProcessElfCore.cpp
index 840a792..d9fa3f8 100644
--- a/lldb/source/Plugins/Process/elf-core/ProcessElfCore.cpp
+++ b/lldb/source/Plugins/Process/elf-core/ProcessElfCore.cpp
@@ -258,7 +258,7 @@
 
 void ProcessElfCore::RefreshStateAfterStop() {}
 
-Error ProcessElfCore::DoDestroy() { return Error(); }
+Error ProcessElfCore::DoDestroy() { return Error::success(); }
 
 //------------------------------------------------------------------
 // Process Queries
@@ -304,7 +304,7 @@
       region_info.SetExecutable(MemoryRegionInfo::eNo);
       region_info.SetMapped(MemoryRegionInfo::eNo);
     }
-    return Error();
+    return Error::success();
   }
 
   region_info.GetRange().SetRangeBase(load_addr);
@@ -313,7 +313,7 @@
   region_info.SetWritable(MemoryRegionInfo::eNo);
   region_info.SetExecutable(MemoryRegionInfo::eNo);
   region_info.SetMapped(MemoryRegionInfo::eNo);
-  return Error();
+  return Error::success();
 }
 
 size_t ProcessElfCore::DoReadMemory(lldb::addr_t addr, void *buf, size_t size,
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
index 49733a5..f0494a8 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
@@ -2672,7 +2672,7 @@
     response.GetEscapedBinaryData(output);
     if (command_output)
       command_output->assign(output);
-    return Error();
+    return Error::success();
   }
   return Error("unable to send packet");
 }
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
index 0897611..440651f 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
@@ -197,13 +197,13 @@
                  __FUNCTION__);
 
   m_process_launch_info.SetArguments(const_cast<const char **>(args), true);
-  return Error();
+  return Error::success();
 }
 
 Error GDBRemoteCommunicationServerLLGS::SetLaunchFlags(
     unsigned int launch_flags) {
   m_process_launch_info.GetFlags().Set(launch_flags);
-  return Error();
+  return Error::success();
 }
 
 Error GDBRemoteCommunicationServerLLGS::LaunchProcess() {
@@ -988,7 +988,7 @@
     return error;
   }
 
-  return Error();
+  return Error::success();
 }
 
 void GDBRemoteCommunicationServerLLGS::StartSTDIOForwarding() {
diff --git a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
index c0fbccb..07d3080 100644
--- a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -1252,7 +1252,7 @@
   m_continue_S_tids.clear();
   m_jstopinfo_sp.reset();
   m_jthreadsinfo_sp.reset();
-  return Error();
+  return Error::success();
 }
 
 Error ProcessGDBRemote::DoResume() {
@@ -3246,7 +3246,7 @@
     const ProcessInfo &process_info) {
   // Make sure we aren't already connected?
   if (m_gdb_comm.IsConnected())
-    return Error();
+    return Error::success();
 
   PlatformSP platform_sp(GetTarget().GetPlatform());
   if (platform_sp && !platform_sp->IsHost())
@@ -4408,7 +4408,7 @@
 
     XMLNode root_element = doc.GetRootElement("library-list-svr4");
     if (!root_element)
-      return Error();
+      return Error::success();
 
     // main link map structure
     llvm::StringRef main_lm = root_element.GetAttributeValue("main-lm");
@@ -4494,7 +4494,7 @@
 
     XMLNode root_element = doc.GetRootElement("library-list");
     if (!root_element)
-      return Error();
+      return Error::success();
 
     root_element.ForEachChildElementWithName(
         "library", [log, &list](const XMLNode &library) -> bool {
@@ -4538,7 +4538,7 @@
     return Error(0, ErrorType::eErrorTypeGeneric);
   }
 
-  return Error();
+  return Error::success();
 }
 
 lldb::ModuleSP ProcessGDBRemote::LoadModuleAtAddress(const FileSpec &file,
@@ -4662,7 +4662,7 @@
       // The file is not loaded into the inferior
       is_loaded = false;
       load_addr = LLDB_INVALID_ADDRESS;
-      return Error();
+      return Error::success();
     }
 
     return Error(
@@ -4672,7 +4672,7 @@
   if (response.IsNormalResponse()) {
     is_loaded = true;
     load_addr = response.GetHexMaxU64(false, LLDB_INVALID_ADDRESS);
-    return Error();
+    return Error::success();
   }
 
   return Error("Unknown error happened during sending the load address packet");
diff --git a/lldb/source/Plugins/Process/mach-core/ProcessMachCore.cpp b/lldb/source/Plugins/Process/mach-core/ProcessMachCore.cpp
index f83499c..1b32117 100644
--- a/lldb/source/Plugins/Process/mach-core/ProcessMachCore.cpp
+++ b/lldb/source/Plugins/Process/mach-core/ProcessMachCore.cpp
@@ -461,7 +461,7 @@
   // SetThreadStopInfo (m_last_stop_packet);
 }
 
-Error ProcessMachCore::DoDestroy() { return Error(); }
+Error ProcessMachCore::DoDestroy() { return Error::success(); }
 
 //------------------------------------------------------------------
 // Process Queries
@@ -564,7 +564,7 @@
       region_info.SetExecutable(MemoryRegionInfo::eNo);
       region_info.SetMapped(MemoryRegionInfo::eNo);
     }
-    return Error();
+    return Error::success();
   }
 
   region_info.GetRange().SetRangeBase(load_addr);
@@ -573,7 +573,7 @@
   region_info.SetWritable(MemoryRegionInfo::eNo);
   region_info.SetExecutable(MemoryRegionInfo::eNo);
   region_info.SetMapped(MemoryRegionInfo::eNo);
-  return Error();
+  return Error::success();
 }
 
 void ProcessMachCore::Clear() { m_thread_list.Clear(); }
diff --git a/lldb/source/Plugins/Process/minidump/ProcessMinidump.cpp b/lldb/source/Plugins/Process/minidump/ProcessMinidump.cpp
index 46d8df8..5b390d8 100644
--- a/lldb/source/Plugins/Process/minidump/ProcessMinidump.cpp
+++ b/lldb/source/Plugins/Process/minidump/ProcessMinidump.cpp
@@ -133,7 +133,7 @@
 
 uint32_t ProcessMinidump::GetPluginVersion() { return 1; }
 
-Error ProcessMinidump::DoDestroy() { return Error(); }
+Error ProcessMinidump::DoDestroy() { return Error::success(); }
 
 void ProcessMinidump::RefreshStateAfterStop() {
   if (!m_active_exception)
diff --git a/lldb/source/Target/Platform.cpp b/lldb/source/Target/Platform.cpp
index 270400a..07d5968 100644
--- a/lldb/source/Target/Platform.cpp
+++ b/lldb/source/Target/Platform.cpp
@@ -172,7 +172,7 @@
                                 const UUID *uuid_ptr, FileSpec &local_file) {
   // Default to the local case
   local_file = platform_file;
-  return Error();
+  return Error::success();
 }
 
 FileSpecList
@@ -1089,7 +1089,7 @@
         "they are controlled by a process plugin");
   }
   Host::Kill(pid, SIGTERM);
-  return Error();
+  return Error::success();
 }
 
 lldb::ProcessSP
@@ -1597,7 +1597,7 @@
   const auto error = module_resolver(resolved_module_spec);
   if (error.Fail()) {
     if (GetCachedSharedModule(resolved_module_spec, module_sp, did_create_ptr))
-      return Error();
+      return Error::success();
   }
 
   return error;
diff --git a/lldb/source/Target/Process.cpp b/lldb/source/Target/Process.cpp
index 67c1489..60e1e33 100644
--- a/lldb/source/Target/Process.cpp
+++ b/lldb/source/Target/Process.cpp
@@ -3359,7 +3359,7 @@
     RestoreProcessEvents();
     SetExitStatus(SIGKILL, "Cancelled async attach.");
     Destroy(false);
-    return Error();
+    return Error::success();
   }
 
   // Wait for 10 second for the process to stop.
@@ -3375,7 +3375,7 @@
 
   BroadcastEvent(event_sp);
 
-  return Error();
+  return Error::success();
 }
 
 Error Process::StopForDestroyOrDetach(lldb::EventSP &exit_event_sp) {
diff --git a/lldb/source/Target/Thread.cpp b/lldb/source/Target/Thread.cpp
index 8e2a9c7..4034ed3 100644
--- a/lldb/source/Target/Thread.cpp
+++ b/lldb/source/Target/Thread.cpp
@@ -1766,7 +1766,7 @@
   if (!reg_ctx->SetPC(dest))
     return Error("Cannot change PC to target address.");
 
-  return Error();
+  return Error::success();
 }
 
 void Thread::DumpUsingSettingsFormat(Stream &strm, uint32_t frame_idx,
diff --git a/lldb/source/Utility/ModuleCache.cpp b/lldb/source/Utility/ModuleCache.cpp
index 889cd8f..c53be90 100644
--- a/lldb/source/Utility/ModuleCache.cpp
+++ b/lldb/source/Utility/ModuleCache.cpp
@@ -70,7 +70,7 @@
     if (!dir_path.IsDirectory())
       return Error("Invalid existing path");
 
-    return Error();
+    return Error::success();
   }
 
   return FileSystem::MakeDirectory(dir_path, eFilePermissionsDirectoryDefault);
@@ -141,7 +141,7 @@
                platform_module_spec.GetPath().c_str());
   if (sysroot_module_path_spec.Exists()) {
     if (!delete_existing)
-      return Error();
+      return Error::success();
 
     DecrementRefExistingModule(root_dir_spec, sysroot_module_path_spec);
   }
@@ -210,7 +210,7 @@
   if (error.Fail())
     return Error("Failed to create link to %s: %s",
                  module_file_path.GetPath().c_str(), error.AsCString());
-  return Error();
+  return Error::success();
 }
 
 Error ModuleCache::Get(const FileSpec &root_dir_spec, const char *hostname,
@@ -221,7 +221,7 @@
   if (find_it != m_loaded_modules.end()) {
     cached_module_sp = (*find_it).second.lock();
     if (cached_module_sp)
-      return Error();
+      return Error::success();
     m_loaded_modules.erase(find_it);
   }
 
@@ -263,7 +263,7 @@
   m_loaded_modules.insert(
       std::make_pair(module_spec.GetUUID().GetAsString(), cached_module_sp));
 
-  return Error();
+  return Error::success();
 }
 
 Error ModuleCache::GetAndPut(const FileSpec &root_dir_spec,
@@ -320,7 +320,7 @@
     // module might
     // contain the necessary symbols and the debugging is also possible without
     // a symfile.
-    return Error();
+    return Error::success();
 
   error = Put(root_dir_spec, escaped_hostname.c_str(), module_spec,
               tmp_download_sym_file_spec,
@@ -332,5 +332,5 @@
 
   FileSpec symfile_spec = GetSymbolFileSpec(cached_module_sp->GetFileSpec());
   cached_module_sp->SetSymbolFileFileSpec(symfile_spec);
-  return Error();
+  return Error::success();
 }