https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92114
kargl at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kargl at gcc dot gnu.org --- Comment #1 from kargl at gcc dot gnu.org --- (In reply to urbanjost from comment #0) > module minimal > implicit none > logical,private :: help,h,version,v > equivalence (help,h),(version,v) > end module minimal > > GNU Fortran (GCC) 7.4.0 > gfortran bug.f90 > f951: internal compiler error: Segmentation fault > > might be similar to bug 77381, but error message is different. > > The only restriction in the standard that seemed to bear on this is > > C593 (R567) The name of an equivalence-object shall not be a name made > accessible by use association. > > but all the variables are PRIVATE. It failed with all variable types I > tried, not just LOGICAL. C593 applies to a USEd associated variable. Nothing is USEd associated in your example. C593 covers % cat a.f90 module m integer num end module m program foo use m integer k equivalence(k,num) num = 1 print *, k end program foo % gfcx -c a.f90 a.f90:8:20: 8 | equivalence(k,num) | 1 Error: EQUIVALENCE attribute conflicts with USE ASSOCIATED attribute in 'num' at (1) For me, the code you posted compiles with GNU Fortran (GCC) 10.0.0 20191014 (experimental) GNU Fortran (GCC) 9.2.1 20191011 GNU Fortran (GCC) 8.3.1 20191010 GNU Fortran (GCC) 7.4.1 20191010 GNU Fortran (GCC) 6.5.0 This may have been fixed by r242802 | kargl | 2016-11-23 13:44:05 -0800 (Wed, 23 Nov 2016) | 10 lines 2016-11-23 Steven G. Kargl <ka...@gcc.gnu.org> PR fortran/78297 * trans-common.c (finish_equivalences): Do not dereference a NULL pointer. 2016-11-23 Steven G. Kargl <ka...@gcc.gnu.org> PR fortran/78297 * gfortran.dg/pr78297.f90: New test.