From: Argyrios Kyrtzidis <akyrtzi@gmail.com>
Date: Sat, 23 Aug 2008 12:12:06 +0000 (+0000)
Subject: Add a safety check.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=2174a4ff834b72c0a0e3f24e4b62123f30f4cce6;p=clang

Add a safety check.
Make sure there's no "dangling" backtrack position when Preprocessor is destroyed.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@55236 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Lex/Preprocessor.cpp b/lib/Lex/Preprocessor.cpp
index a4ff8bb734..18b106ad84 100644
--- a/lib/Lex/Preprocessor.cpp
+++ b/lib/Lex/Preprocessor.cpp
@@ -84,6 +84,8 @@ Preprocessor::Preprocessor(Diagnostic &diags, const LangOptions &opts,
 }
 
 Preprocessor::~Preprocessor() {
+  assert(BacktrackPositions.empty() && "EnableBacktrack/Backtrack imbalance!");
+
   // Free any active lexers.
   delete CurLexer;