Your bug report

#31987: [cygwin] libGL error: required WGL extension WGL_ARB_multisample is missing

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 31987@debbugs.gnu.org.

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31987: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=31987
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