commit 5adc0515aaacb6c4d4f0c9626d86c1e5c177467c
author Argyrios Kyrtzidis <akyrtzi@gmail.com> Tue May 17 22:09:53 2011 +0000
committer Argyrios Kyrtzidis <akyrtzi@gmail.com> Tue May 17 22:09:53 2011 +0000
tree 02e0756b439d9ca0e133f19fae127fa6c9de1889
parent badea57d1db45caa95e71a256f4f4cf94fe20451

Do some safety checks.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@131491 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Basic/SourceManager.cpp

diff --git a/lib/Basic/SourceManager.cpp b/lib/Basic/SourceManager.cpp
index c3e0393..ae7de2d 100644
--- a/lib/Basic/SourceManager.cpp
+++ b/lib/Basic/SourceManager.cpp
@@ -961,6 +961,12 @@
 /// about to emit a diagnostic.
 unsigned SourceManager::getLineNumber(FileID FID, unsigned FilePos, 
                                       bool *Invalid) const {
+  if (FID.isInvalid()) {
+    if (Invalid)
+      *Invalid = true;
+    return 1;
+  }
+
   ContentCache *Content;
   if (LastLineNoFileIDQuery == FID)
     Content = LastLineNoContentCache;