https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59065
--- Comment #10 from Vittorio Zecca <zeccav at gmail dot com> --- This issue seems to have been resolved in the trunk gfortran 11.0.0 gfortran gfbug109.f -fcheck=pointer -g [vitti f95]$./a.out At line 9 of file gfbug109.f Fortran runtime error: Allocatable argument 'aa' is not allocated Error termination. Backtrace: #0 0x1458cf822d74 in ??? #1 0x1458cf823849 in ??? #2 0x1458cf823e5a in ??? #3 0x401b94 in MAIN__ at /home/vitti/f95/gfbug109.f:9 #4 0x401eb1 in main at /home/vitti/f95/gfbug109.f:11