Diagnose attempts to update standard output.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111649 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/FileUpdate/FileUpdate.cpp b/utils/FileUpdate/FileUpdate.cpp
index b97d9cf..8377aea 100644
--- a/utils/FileUpdate/FileUpdate.cpp
+++ b/utils/FileUpdate/FileUpdate.cpp
@@ -36,6 +36,11 @@
PrettyStackTraceProgram X(argc, argv);
cl::ParseCommandLineOptions(argc, argv);
+ if (OutputFilename == "-") {
+ errs() << argv[0] << ": error: Can't update standard output\n";
+ return 1;
+ }
+
// Get the input data.
std::string ErrorStr;
MemoryBuffer *In =