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Date:	Sat, 26 Nov 2022 10:43:19 +0900
From:	Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
To:	cygwin AT cygwin DOT com
Cc:	Dmitry Karasik <dmitry AT karasik DOT eu DOT org>
Subject:	Re: coredumps and/or CPU eating zombies after dlopen/fork
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On Fri, 25 Nov 2022 14:22:15 +0100
Dmitry Karasik wrote:
> Otherwise, to reproduce, download and unpack http://karasik.eu.org/misc/cygwin/cygwin-gtk-dlopen-fork-bug.tar
> and run ./try there.

Why do you include windows.h in test.c?
I encountered following error.

/usr/include/w32api/processthreadsapi.h:165:11: Error: expected identifier or $B!F(B($B!G(B before numeric constant
  165 |     ULONG ControlMask;
      |           ^~~~~~~~~~~

Removing #include <windows.h> or adding
#undef ControlMask
is necessary to compile test.c without errors.

With that modification, your problem can not be reproducible
in my environment. The result is as follows.

not expecting a bug
child existed with 0
expecting a bug
child existed with 0
no bug detected

-- 
Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>

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