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2006-11-24 Paul Thomas <pault@gcc.gnu.org>
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PR fortran/20880
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* parse.c (parse_interface): Error if procedure name is that of
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encompassing scope.
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* gfortran.dg/interface_3a.f90: New test.
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--- gcc/fortran/parse.c (revision 119172)
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+++ gcc/fortran/parse.c (revision 119173)
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@@ -1694,6 +1694,7 @@ parse_interface (void)
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gfc_interface_info save;
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gfc_state_data s1, s2;
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gfc_statement st;
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+ locus proc_locus;
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accept_statement (ST_INTERFACE);
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@@ -1781,6 +1782,7 @@ loop:
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accept_statement (st);
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prog_unit = gfc_new_block;
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prog_unit->formal_ns = gfc_current_ns;
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+ proc_locus = gfc_current_locus;
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decl:
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/* Read data declaration statements. */
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@@ -1796,8 +1798,15 @@ decl:
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current_interface = save;
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gfc_add_interface (prog_unit);
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-
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pop_state ();
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+
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+ if (current_interface.ns
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+ && current_interface.ns->proc_name
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+ && strcmp (current_interface.ns->proc_name->name,
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+ prog_unit->name) == 0)
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+ gfc_error ("INTERFACE procedure '%s' at %L has the same name as the "
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+ "enclosing procedure", prog_unit->name, &proc_locus);
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+
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goto loop;
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done:
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--- gcc/testsuite/gfortran.dg/interface_3a.f90
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+++ gcc/testsuite/gfortran.dg/interface_3a.f90
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@@ -0,0 +1,13 @@
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+! { dg-do compile }
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+! Contributed by Joost VandeVondele <jv244@cam.ac.uk>
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+!
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+! This was found whilst investigating => segfault
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+subroutine thy_sub (a)
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+ interface
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+ subroutine thy_sub (a) ! { dg-error "enclosing procedure" }
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+ real a
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+ end subroutine
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+ end interface
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+ real a
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+ print *, a
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+end subroutine
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