https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96486
--- Comment #13 from Susi Lehtola <jussilehtola at fedoraproject dot org> --- The gdb output is the same (gdb) r Starting program: /tmp/a.out Fortran runtime error: Zero-length string passed as value to get_environment_variable. Error termination. Backtrace: #0 0x401267 in zerolen_value at /tmp/readvar2.f90:17 #1 0x4012c4 in main at /tmp/readvar2.f90:22 [Inferior 1 (process 122282) exited with code 02]