Avoid binding a reference to a dereferenced null pointer, if we try to emit a
diagnostic before we have a source manager.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162070 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Diagnostic.cpp b/lib/Basic/Diagnostic.cpp
index 2c49c2f..8065b2d 100644
--- a/lib/Basic/Diagnostic.cpp
+++ b/lib/Basic/Diagnostic.cpp
@@ -145,6 +145,9 @@
assert(DiagStatePoints.front().Loc.isInvalid() &&
"Should have created a DiagStatePoint for command-line");
+ if (!SourceMgr)
+ return DiagStatePoints.end() - 1;
+
FullSourceLoc Loc(L, *SourceMgr);
if (Loc.isInvalid())
return DiagStatePoints.end() - 1;