[Bug fortran/49023] ICE on invalid code with C_ASSOCIATED
burnus at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Wed May 18 16:55:00 GMT 2011
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49023
Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |burnus at gcc dot gnu.org
--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> 2011-05-18 16:09:54 UTC ---
==31261== Invalid read of size 8
==31261== at 0x510673: gfc_resolve_expr (resolve.c:2674)
==31261== by 0x50E37C: resolve_code (resolve.c:9026)
That's at first "if" block gfc_iso_c_func_interface. In this example, one has
expr_type == EXPR_ARRAY. I think the following patch should be OK (for F2003,
in F2008, the pointer returned by functions also counts as variable).
Additionally, one needs to add a check for the second argument; the program
crashes for
C_ASSOCIATED(x,[y])
at gfc_conv_array_constructor_expr, at fortran/trans-expr.c:4120
--- resolve.c (revision 173865)
+++ resolve.c (working copy)
@@ -2666,9 +2666,8 @@ gfc_iso_c_func_interface (gfc_symbol *sy
gfc_typespec *arg_ts;
symbol_attribute arg_attr;
- if (args->expr->expr_type == EXPR_CONSTANT
- || args->expr->expr_type == EXPR_OP
- || args->expr->expr_type == EXPR_NULL)
+ if (args->expr->expr_type != EXPR_VARIABLE
+ || args->expr->symtree->n.sym->attr.flavor != FL_VARIABLE)
{
gfc_error ("Argument to '%s' at %L is not a variable",
sym->name, &(args->expr->where));
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