Index: lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
===================================================================
--- lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
+++ lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
@@ -1211,7 +1211,8 @@
 
     // Check for release functions, the only kind of functions that we care
     // about that don't return a pointer type.
-    if (FName[0] == 'C' && (FName[1] == 'F' || FName[1] == 'G')) {
+    if (FName.size() >= 2 &&
+        FName[0] == 'C' && (FName[1] == 'F' || FName[1] == 'G')) {
       // Test for 'CGCF'.
       FName = FName.substr(FName.startswith("CGCF") ? 4 : 2);
 
Index: test/Analysis/retain-release.mm
===================================================================
--- test/Analysis/retain-release.mm
+++ test/Analysis/retain-release.mm
@@ -461,3 +461,5 @@
 	}
 }
 
+// rdar://34210609
+void _() { _(); }; // no-warning