[clang] Surface error for plain return statement in coroutine earlier (PR #100985)

[via cfe-commits]

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@@ -3,6 +3,7 @@
 
 // RUN: %clang_cc1 -std=c++23 -fsyntax-only -verify=expected,cxx20_23,cxx23    %s -fcxx-exceptions -fexceptions -Wunused-result
 // RUN: %clang_cc1 -std=c++20 -fsyntax-only -verify=expected,cxx14_20,cxx20_23 %s -fcxx-exceptions -fexceptions -Wunused-result
+// RUN: not %clang_cc1 -std=c++20 -fsyntax-only %s -fcxx-exceptions -fexceptions -Wunused-result 2>&1 | FileCheck %s
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ivanaivanovska wrote:

Done.

https://github.com/llvm/llvm-project/pull/100985