test/Driver/windows-seh-async-verify.cpp

// RUN: %clang --target=x86_64-pc-windows -fasync-exceptions -fsyntax-only -### %s 2>&1 | FileCheck %s
// RUN: %clang_cl --target=x86_64-pc-windows /EHa -fsyntax-only -### -- %s 2>&1 | FileCheck %s
// RUN: %clang --target=x86_64-pc-windows-gnu -fasync-exceptions -fsyntax-only -### %s 2>&1 | FileCheck %s --check-prefixes=GNU-ALL,GNU
// RUN: %clang_cl --target=x86_64-pc-windows-gnu /EHa -fsyntax-only -### -- %s 2>&1 | FileCheck %s --check-prefixes=GNU-ALL,CL-GNU

// CHECK-NOT: warning
// GNU: warning: argument unused during compilation: '-fasync-exceptions' [-Wunused-command-line-argument]
// CL-GNU: warning: argument unused during compilation: '/EHa' [-Wunused-command-line-argument]

// CHECK: -fasync-exceptions
// GNU-ALL-NOT: -fasync-exceptions
struct S {
    union _Un {
        ~_Un() {}
        char _Buf[12];
    };
    _Un _un;
};

struct Embed {
    S v2;
};

void PR62449() { Embed v{}; }