Your bug report

#64879: Error: obstack.c: In function '_obstack_allocated_p':

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 64879@debbugs.gnu.org.

-- 
64879: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=64879
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