https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63733
--- Comment #4 from janus at gcc dot gnu.org --- (In reply to Dominique d'Humieres from comment #1) > likely r195729 (pr54195). Reverting this commit on trunk yields: test_ov.f90:7:32: generic :: operator(+) => sum 1 Error: Entity »sum_parent« at (1) is already present in the interface So it's not the cause of this regression either.