From: Daniel Dunbar <daniel@zuster.org>
Date: Thu, 12 Feb 2009 19:31:53 +0000 (+0000)
Subject: Fix assertion when input is an empty string.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=82320e94606cfb0f68c6049c070c3600f8df9081;p=clang

Fix assertion when input is an empty string.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64397 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Lex/PTHLexer.cpp b/lib/Lex/PTHLexer.cpp
index 4648ac8ee4..0cd17e74a4 100644
--- a/lib/Lex/PTHLexer.cpp
+++ b/lib/Lex/PTHLexer.cpp
@@ -721,7 +721,7 @@ IdentifierInfo* PTHManager::LazilyCreateIdentifierInfo(unsigned PersistentID) {
 IdentifierInfo* PTHManager::get(const char *NameStart, const char *NameEnd) {
   PTHStringIdLookup& SL = *((PTHStringIdLookup*)StringIdLookup);
   // Double check our assumption that the last character isn't '\0'.
-  assert(NameStart[NameEnd-NameStart-1] != '\0');
+  assert(NameEnd==NameStart || NameStart[NameEnd-NameStart-1] != '\0');
   PTHStringIdLookup::iterator I = SL.find(std::make_pair(NameStart,
                                                          NameEnd - NameStart));
   if (I == SL.end()) // No identifier found?