Your bug report

#15924: [PATCH] dfa: avoid undefined behavior of "1 << 31"

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

The explanation is attached below, along with your original report.
If you require more details, please reply to 15924@debbugs.gnu.org.

-- 
15924: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=15924
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