From: Ted Kremenek <kremenek@apple.com>
Date: Thu, 27 Feb 2014 21:56:41 +0000 (+0000)
Subject: [analyzer] check for now possibly null predecessor edge.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d4ba7a271dee92a4f5a2985f94aefb9c38dd238b;p=clang

[analyzer] check for now possibly null predecessor edge.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@202434 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/StaticAnalyzer/Checkers/UnreachableCodeChecker.cpp b/lib/StaticAnalyzer/Checkers/UnreachableCodeChecker.cpp
index 4c913a6e4a..66c1acd9a8 100644
--- a/lib/StaticAnalyzer/Checkers/UnreachableCodeChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/UnreachableCodeChecker.cpp
@@ -178,6 +178,9 @@ void UnreachableCodeChecker::FindUnreachableEntryPoints(const CFGBlock *CB,
 
   for (CFGBlock::const_pred_iterator I = CB->pred_begin(), E = CB->pred_end();
       I != E; ++I) {
+    if (!*I)
+      continue;
+
     if (!reachable.count((*I)->getBlockID())) {
       // If we find an unreachable predecessor, mark this block as reachable so
       // we don't report this block
@@ -219,6 +222,8 @@ bool UnreachableCodeChecker::isInvalidPath(const CFGBlock *CB,
     return false;
 
   const CFGBlock *pred = *CB->pred_begin();
+  if (!pred)
+    return false;
 
   // Get the predecessor block's terminator conditon
   const Stmt *cond = pred->getTerminatorCondition();