commit f15eac1110cc963cabda42759e6eb9d6f077f30a
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 6e98d79bd5787da74fae1bf67d1e9c15f91e8143
parent af9b325d232f52ca858c67cd497b79f5e63716af

Do some safety checks.

llvm-svn: 131491

clang/lib/Basic/SourceManager.cpp

diff --git a/clang/lib/Basic/SourceManager.cpp b/clang/lib/Basic/SourceManager.cpp
index c3e0393..ae7de2d 100644
--- a/clang/lib/Basic/SourceManager.cpp
+++ b/clang/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;