Index: lib/StaticAnalyzer/Checkers/InnerPointerChecker.cpp
===================================================================
--- lib/StaticAnalyzer/Checkers/InnerPointerChecker.cpp
+++ lib/StaticAnalyzer/Checkers/InnerPointerChecker.cpp
@@ -211,8 +211,11 @@
   ProgramStateRef State = C.getState();
 
   if (const auto *ICall = dyn_cast<CXXInstanceCall>(&Call)) {
+    // TODO: Do we need these to be typed?
     const auto *ObjRegion = dyn_cast_or_null<TypedValueRegion>(
         ICall->getCXXThisVal().getAsRegion());
+    if (!ObjRegion)
+      return;
 
     if (Call.isCalled(CStrFn) || Call.isCalled(DataFn)) {
       SVal RawPtr = Call.getReturnValue();
Index: test/Analysis/inner-pointer.cpp
===================================================================
--- test/Analysis/inner-pointer.cpp
+++ test/Analysis/inner-pointer.cpp
@@ -424,3 +424,7 @@
   *(void **)&b = c() + 1;
   *b = a; // no-crash
 }
+
+void checkReference(std::string &s) {
+  const char *c = s.c_str();
+}