Fix FileCheck crash when fuzzy scanning starting at the end of the file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90065 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/utils/FileCheck/FileCheck.cpp b/utils/FileCheck/FileCheck.cpp
index 101ff2488089e1a9ad0261cdd93199f033842101..078028a115cf27a0ea31e4f288c05c98a131519c 100644 (file)
--- a/utils/FileCheck/FileCheck.cpp
+++ b/utils/FileCheck/FileCheck.cpp
@@ -398,7 +398,7 @@ void Pattern::PrintFailureInfo(const SourceMgr &SM, StringRef Buffer,
     }
   }
 
-  if (BestQuality < 50) {
+  if (Best != StringRef::npos && BestQuality < 50) {
     // Print the "possible intended match here" line if we found something
     // reasonable.
     SM.PrintMessage(SMLoc::getFromPointer(Buffer.data() + Best),