Consider the following code:
```
#include <assert.h>
#include <fcntl.h>
#include <io.h>
#include <stdio.h>
int main (void) {
_setmode (_fileno (stderr), _O_U8TEXT);
assert (0);
return 0;
}
```
When compiled with MSVC, it properly prints message about failed assertion.
When it is compiled with mingw-w64's headers (Msys2/UCRT64) it produces no
output.
mingw-w64's assert.h maps assert() macro to _wassert only when _UNICODE or
UNICODE is defined. MSVC's assert.h always maps assert() macro to _wassert and
even no longer exposes _assert function.
How about we always map assert() macro to _wassert for msvcr80.dll and later?
Since we also emulate _wassert for msvcrt.dll, it should be OK to map it to
_wassert for msvcrt.dll as well.
- Kirill Makurin
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