https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111341
kargl at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kargl at gcc dot gnu.org Priority|P3 |P4 --- Comment #1 from kargl at gcc dot gnu.org --- gfcx -c a.f90 a.f90:3:7: 3 | use iso_varying_string, only: varying_string, operator(//), put_line | 1 Fatal Error: Cannot open module file 'iso_varying_string.mod' for reading at (1: No such file or directory Unforturnately, it seems the issue cannot be reproduced.