That would need to be reported to the grep program.
``` C:\Program Files (x86)\Geany\bin>"C:\Program Files (x86)\Geany\bin\grep.exe" --version grep (GNU grep) 2.26 Copyright (C) 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
Written by Mike Haertel and others, see http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS. ``` Windows version grep maintain same developer (original version grep)?
what version of Geany? There were fixes for this in the latest release IIRC.
Geany 1.29 (built on or after Nov 13 2016) already have a newer version?