https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103777
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Harald Anlauf <anl...@gcc.gnu.org>: https://gcc.gnu.org/g:49d73c9fb644673323845efebfe6b3106e70af8a commit r12-6388-g49d73c9fb644673323845efebfe6b3106e70af8a Author: Harald Anlauf <anl...@gmx.de> Date: Mon Dec 20 22:59:53 2021 +0100 Fortran: check arguments of MASKL/MASKR intrinsics before simplification gcc/fortran/ChangeLog: PR fortran/103777 * simplify.c (gfc_simplify_maskr): Check validity of argument 'I' before simplifying. (gfc_simplify_maskl): Likewise. gcc/testsuite/ChangeLog: PR fortran/103777 * gfortran.dg/masklr_3.f90: New test.