Teach the serialized diagnostic writer to clone() itself, sharing
state so that all of the various clones end up rendering their
diagnostics into the same serialized-diagnostics file. This is
important when we actually want failures during module build to be
reported back to the translation unit that tried to import the
not-yet-built or out-of-date module. <rdar://problem/12565727>
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169057 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Modules/build-fail-notes.m b/test/Modules/build-fail-notes.m
index 4c5d5f5..8ab1cbc 100644
--- a/test/Modules/build-fail-notes.m
+++ b/test/Modules/build-fail-notes.m
@@ -17,3 +17,15 @@
// CHECK-REDEF: In module 'DependsOnModule' imported from
// CHECK-REDEF: In module 'Module' imported from
// CHECK-REDEF: Module.h:15:12: note: previous definition is here
+
+// RUN: %clang_cc1 -fmodule-cache-path %t -fmodules -F %S/Inputs -DgetModuleVersion="epic fail" -serialize-diagnostic-file %t.diag %s 2>&1 || true
+// RUN: c-index-test -read-diagnostics %t.diag 2>&1 | FileCheck -check-prefix=CHECK-SDIAG %s
+
+// CHECK-SDIAG: Inputs/Module.framework/Headers/Module.h:9:13: error: expected ';' after top level declarator
+// CHECK-SDIAG: build-fail-notes.m:4:32: note: while building module 'DependsOnModule' imported from
+// CHECK-SDIAG: Inputs/DependsOnModule.framework/Headers/DependsOnModule.h:1:10: note: while building module 'Module' imported from
+// CHECK-SDIAG: note: expanded from macro 'getModuleVersion'
+// CHECK-SDIAG: warning: umbrella header does not include header 'NotInModule.h' [-Wincomplete-umbrella]
+// CHECK-SDIAG: Inputs/DependsOnModule.framework/Headers/DependsOnModule.h:1:10: fatal: could not build module 'Module'
+// CHECK-SDIAG: build-fail-notes.m:4:32: note: while building module 'DependsOnModule' imported from
+