The following code is invalid due to the "external sin" line. Nonetheless, we get an ICE.
kargl[255] gfc4x -o z v.f90 v.f90: In function 'MAIN__': v.f90:2: internal compiler error: in build_function_decl, at fortran/trans-decl.c:1131 program a external sin print *, sin() contains integer function sin () sin = 1 end function sin end program a -- Summary: EXTERNAL statement cause ICE in trans-decl.c Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: kargl at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25813