[clang] [C++20][Coroutines] lambda-coroutine with promise_type ctor. (PR #84519)

[via cfe-commits]

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@@ -596,8 +596,21 @@ VarDecl *Sema::buildCoroutinePromise(SourceLocation Loc) {
 
   // Add implicit object parameter.
   if (auto *MD = dyn_cast<CXXMethodDecl>(FD)) {
-    if (MD->isImplicitObjectMemberFunction() && !isLambdaCallOperator(MD)) {
-      ExprResult ThisExpr = ActOnCXXThis(Loc);
+    if (MD->isImplicitObjectMemberFunction()) {
+      ExprResult ThisExpr{};
+
+      if (isLambdaCallOperator(MD) && !MD->isStatic()) {
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cor3ntin wrote:

`MD->isStatic()` can never be true (because `isImplicitObjectMemberFunction` is true)

https://github.com/llvm/llvm-project/pull/84519