================
@@ -590,6 +590,26 @@ static ProgramStateRef 
getInlineFailedState(ProgramStateRef State,
 
 void ExprEngine::VisitCallExpr(const CallExpr *CE, ExplodedNode *Pred,
                                ExplodedNodeSet &dst) {
+  if (const auto *OCE = dyn_cast<CXXOperatorCallExpr>(CE)) {
+    // For instance method operators, make sure the 'this' argument has a
+    // valid region.
+    // FIXME: Why is this only applied for operator calls and not other calls?
----------------
steakhal wrote:

You could put an abort there to see when its triggered for operator calls, then 
tweak the case to use a member call instead and see what happens.

https://github.com/llvm/llvm-project/pull/200837
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