[arcmt] Make -Warc-unsafe-retained-assign an error when migrating. rdar://8939557

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133627 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/ARCMigrate/ARCMT.cpp b/lib/ARCMigrate/ARCMT.cpp
index 13bb33d2b8..7f3479604e 100644
--- a/lib/ARCMigrate/ARCMT.cpp
+++ b/lib/ARCMigrate/ARCMT.cpp
@@ -187,6 +187,8 @@ CompilerInvocation *createInvocationForMigration(CompilerInvocation &origCI) {
   CInvok->getPreprocessorOpts().addMacroDef(define);
   CInvok->getLangOpts().ObjCAutoRefCount = true;
   CInvok->getDiagnosticOpts().ErrorLimit = 0;
+  CInvok->getDiagnosticOpts().Warnings.push_back(
+                                            "error=arc-unsafe-retained-assign");
   CInvok->getLangOpts().ObjCNoAutoRefCountRuntime = !HasARCRuntime(origCI);
 
   return CInvok.take();