[analyzer] Do not crash in CallEvent.getReturnType()

When the call expression is not available.

llvm-svn: 328406

1 files changed, 5 insertions, 3 deletions

diff --git a/clang/lib/StaticAnalyzer/Core/CallEvent.cpp b/clang/lib/StaticAnalyzer/Core/CallEvent.cpp
index 3ff02f17d03..dab5335ae09 100644
--- a/clang/lib/StaticAnalyzer/Core/CallEvent.cpp
+++ b/clang/lib/StaticAnalyzer/Core/CallEvent.cpp
@@ -67,11 +67,13 @@ using namespace clang;
 using namespace ento;
 
 QualType CallEvent::getResultType() const {
+  ASTContext &Ctx = getState()->getStateManager().getContext();
   const Expr *E = getOriginExpr();
-  assert(E && "Calls without origin expressions do not have results");
-  QualType ResultTy = E->getType();
+  if (!E)
+    return Ctx.VoidTy;
+  assert(E);
 
-  ASTContext &Ctx = getState()->getStateManager().getContext();
+  QualType ResultTy = E->getType();
 
   // A function that returns a reference to 'int' will have a result type
   // of simply 'int'. Check the origin expr's value kind to recover the