https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90730
Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |accepts-invalid --- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> --- Another invalid example that's accepted: -fdump-tree-gimple-all-all-details-details Based on a warning when one is issued, it looks like GCC simply ignores all syntactically valid "keywords" after -fdump-tree-<pass>- like all and details but gives warnings for invalid ones. $ gcc -Wall -Wextra -S -fdump-tree-gimple-all-details-detail -xc - < /dev/null cc1: warning: ignoring unknown option ‘detail’ in ‘-fdump-tree-gimple’