Chi Hsuan Yen added the comment:

> Please try without "sigaction(SIGSEGV, NULL, NULL);". Does the program still 
> quit?

Nope.

int main()
{
    raise(SIGSEGV);
}

Still exits normally with 0.

> Does faulthandler._read_null() crash Python?

Yes.

int main()
{
    int *x = 0;
    int y = *x;
    return 0;
}

Is killed and exits with 139 as expected.

----------

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue26934>
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