https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77694
Bug ID: 77694 Summary: ICE in optimize_binop_array_assignment, at fortran/frontend-passes.c:1080 Product: gcc Version: 7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran Assignee: unassigned at gcc dot gnu.org Reporter: gerhard.steinmetz.fort...@t-online.de Target Milestone: --- Invalid code with an unknown operator (here .nt. instead of .not.). For versions down to at least 4.8, at -Og, -Os, -O1 or higher. No ICE with option -fno-frontend-optimize. $ cat z1.f90 program p logical :: x(2), y(2) x = .true. y = .nt. x end $ cat z2.f90 program p logical :: x, y(2) x = .true. y = .nt. x end $ gfortran-7-20160918 -O2 z1.f90 z1.f90:4:7: y = .nt. x 1 Error: Unknown operator 'nt' at (1) f951: internal compiler error: Segmentation fault 0xc21a5f crash_signal ../../gcc/toplev.c:336 0x7b3550 optimize_binop_array_assignment ../../gcc/fortran/frontend-passes.c:1080 0x7b44ae optimize_assignment ../../gcc/fortran/frontend-passes.c:1199 0x7b44ae optimize_code ../../gcc/fortran/frontend-passes.c:236 0x7b6ea9 gfc_code_walker(gfc_code**, int (*)(gfc_code**, int*, void*), int (*)(gfc_expr**, int*, void*), void*) ../../gcc/fortran/frontend-passes.c:3412 0x7b7f04 optimize_namespace ../../gcc/fortran/frontend-passes.c:1020 0x7b80c0 gfc_run_passes(gfc_namespace*) ../../gcc/fortran/frontend-passes.c:132 0x6f2287 gfc_resolve(gfc_namespace*) ../../gcc/fortran/resolve.c:15760 0x6dd21a resolve_all_program_units ../../gcc/fortran/parse.c:5875 0x6dd21a gfc_parse_file() ../../gcc/fortran/parse.c:6127 0x71faa2 gfc_be_parse_file ../../gcc/fortran/f95-lang.c:198