https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66106
kargl at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P3 |P4 Status|UNCONFIRMED |NEW Last reconfirmed| |2015-05-11 CC| |kargl at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #1 from kargl at gcc dot gnu.org --- Confirmed. F2003 standard states C1202 (R1201) The generic-spec shall be included in the end-interface-stmt only if it is provided in the interface-stmt. ... If the end-interface-stmt includes OPERATOR(defined-operator ), the interface-stmt shall specify the same defined-operator. This patch Index: interface.c =================================================================== --- interface.c (revision 222916) +++ interface.c (working copy) @@ -346,8 +346,12 @@ gfc_match_end_interface (void) break; m = MATCH_ERROR; - gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> at %C, " - "but got %s", s1, s2); + if (strcmp(s2, "none") == 0) + gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> " + "at %C, ", s1); + else + gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> at %C, " + "but got %s", s1, s2); } } Index: match.c =================================================================== --- match.c (revision 222916) +++ match.c (working copy) @@ -110,6 +110,9 @@ gfc_op2string (gfc_intrinsic_op op) case INTRINSIC_PARENTHESES: return "parens"; + case INTRINSIC_NONE: + return "none"; + default: break; } yields % gfc6 -c jk.f90 jk.f90:3:28: end interface operator 1 Error: Expecting 'END INTERFACE OPERATOR (.gt.)' at (1), jk.f90:4:6: end 1 Error: END INTERFACE statement expected at (1) f951: Error: Unexpected end of file in 'jk.f90'