std::mutex bug: Windows handle growth

[Noel Grandin]

Hi

Hazarding a guess here:

On 3/16/2026 11:39 PM, Frank Eskesen via Cygwin wrote:
> I've run into a problem that occurs on Cygwin that doesn't occur on Linux
> systems: When a std::mutex is used, it doesn't clean up a Windows handle that
> it uses. This sample program demonstrates the problem, failing in under 60
This code looks suspicious:

     pthread_mutex::destroy ()
     {
       if (condwaits || trylock ())
         // Do not destroy a condwaited or locked mutex
         return EBUSY;

I think it should be

       if (condwaits || !trylock ())

Regards, Noel Grandin