https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111528
--- Comment #3 from Richard Sandiford <rsandifo at gcc dot gnu.org> --- This was the problem that g:10d59b802a7db9ae908291fb20627c1493cfa26c fixed. I wasn't sure it was worth backporting because it only triggers for out-of-bounds array accesses, or uninitialised Fortran array indices.