[frontend] Initialize the diagnostic client before loading an ast file.

Issue reported by Tom Honermann!
http://llvm.org/bugs/show_bug.cgi?id=15377

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177336 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/Frontend/FrontendAction.cpp b/lib/Frontend/FrontendAction.cpp
index 6d31c315b4..c47423c087 100644
--- a/lib/Frontend/FrontendAction.cpp
+++ b/lib/Frontend/FrontendAction.cpp
@@ -188,6 +188,10 @@ bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
 
     setCurrentInput(Input, AST);
 
+    // Inform the diagnostic client we are processing a source file.
+    CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(), 0);
+    HasBegunSourceFile = true;
+
     // Set the shared objects, these are reset when we finish processing the
     // file, otherwise the CompilerInstance will happily destroy them.
     CI.setFileManager(&AST->getFileManager());