From d13eff6f77216a6fb25e18f600b492db4f0492e8 Mon Sep 17 00:00:00 2001
From: Ted Kremenek <kremenek@apple.com>
Date: Tue, 2 Oct 2012 04:36:54 +0000
Subject: [PATCH] Check if an IdentifierInfo* is null when the FunctionDecl
 isn't a simple C function.

Fixes <rdar://problem/12355298>

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164988 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Sema/SemaChecking.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index 7498d34892..81be8bfe8f 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -5510,8 +5510,12 @@ static Expr *findCapturingExpr(Sema &S, Expr *e, RetainCycleOwner &owner) {
   } else if (CallExpr *CE = dyn_cast<CallExpr>(e)) {
     if (CE->getNumArgs() == 1) {
       FunctionDecl *Fn = dyn_cast_or_null<FunctionDecl>(CE->getCalleeDecl());
-      if (Fn && Fn->getIdentifier()->isStr("_Block_copy"))
-        e = CE->getArg(0)->IgnoreParenCasts();
+      if (Fn) {
+        const IdentifierInfo *FnI = Fn->getIdentifier();
+        if (FnI && FnI->isStr("_Block_copy")) {
+          e = CE->getArg(0)->IgnoreParenCasts();
+        }
+      }
     }
   }
   
-- 
2.40.0