Index: include/llvm/ADT/StringRef.h
===================================================================
--- include/llvm/ADT/StringRef.h	(revision 129637)
+++ include/llvm/ADT/StringRef.h	(copie de travail)
@@ -56,7 +56,7 @@
 
     /// Construct a string ref from a cstring.
     /*implicit*/ StringRef(const char *Str)
-      : Data(Str), Length(::strlen(Str)) {}
+      : Data(Str), Length(Str ? ::strlen(Str) : 0) {}
 
     /// Construct a string ref from a pointer and length.
     /*implicit*/ StringRef(const char *data, size_t length)