[clang] [Clang] fix crash by avoiding invalidation of extern main declaration during strictness checks (PR #104594)

[Oleksandr T. via cfe-commits]

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@@ -122,6 +119,26 @@ namespace ns2 {
   extern "C++" void main() {} // ok
 }
 
+#elif TEST14
+extern "C" {
+  int main(); // expected-warning {{'main' should not be 'extern "C"'}}
+}
+
+extern "C" int main(); // expected-warning {{'main' should not be 'extern "C"'}}
+
+#elif TEST15
+extern "C" __attribute__((visibility("default"))) __attribute__((weak))
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a-tarasyuk wrote:

I've updated test, thanks

https://github.com/llvm/llvm-project/pull/104594