Your bug report

#18806: grep -rP getline crashes prematurely (without displaying all results) on invalid UTF-8 input with LC_ALL=en_US.UTF-8

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 18806@debbugs.gnu.org.

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18806: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=18806
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