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Date: Fri, 19 Jan 2024 22:44:36 +0900
To: cygwin@cygwin.com
Subject: Possiblly bug of cygwin1.dll
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From: Takashi Yano via Cygwin <cygwin@cygwin.com>
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Hi,

I might find the bug of cygwin1.dll (including 3.4.x, 3.5.0 (TEST)).
The following test case (c++ code) causes handle leak.

This issue is reproducible with both g++ and clang++.
However, it does not happen in Linux environment.
So I guess this is the cygwin1.dlll bug.

I looked into this problem a bit, and found number of event handle
increases every loop.

I doubt pthread_mutex_xxx functions.

#include <future>
int func() { return 0; }
int main()
{
  for (;;) {
    std::future<int> f = std::async(std::launch::async, func);
    f.get();
  }
  return 0;
}

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>

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