On Fri, Nov 13, 2015 at 01:57:13PM -0800, Steve Kargl wrote:
> The attached patch fixes an ICE that occurs in arith.c(gfc_arith_concat)
> because op1 and op2 have incompatible typespecs. The fix is actually
> implemented in array.c(gfc_match_array_constructor) where the types
> of the elements in a constructor are compared to the typespec that was
> specified in the constructor. See testcase for examples. Built
> and regression tested on x86_64-*-freebsd. OK to commit?
>
> 2015-11-13 Steven G. Kargl <ka...@gcc.gnu.org>
>
> PR fortran/67803
> * array.c (gfc_match_array_constructor): If array constructor included
> a CHARACTER typespec, check array elements for compatible type.
>
> 2015-11-13 Steven G. Kargl <ka...@gcc.gnu.org>
>
> PR fortran/67803
> * gfortran.dg/pr67803.f90: New test.
>
Now with a patch attached.
--
Steve
Index: gcc/fortran/array.c
===================================================================
--- gcc/fortran/array.c (revision 230351)
+++ gcc/fortran/array.c (working copy)
@@ -1162,6 +1162,35 @@ done:
{
expr = gfc_get_array_expr (ts.type, ts.kind, &where);
expr->ts = ts;
+
+ /* If the typespec is CHARACTER, check that array elements can
+ be converted. See PR fortran/67803. */
+ if (ts.type == BT_CHARACTER)
+ {
+ gfc_constructor *c;
+
+ c = gfc_constructor_first (head);
+ for (; c; c = gfc_constructor_next (c))
+ {
+ if (gfc_numeric_ts (&c->expr->ts)
+ || c->expr->ts.type == BT_LOGICAL)
+ {
+ gfc_error ("Incompatiable typespec for array element at %L",
+ &c->expr->where);
+ return MATCH_ERROR;
+ }
+
+ /* Special case null(). */
+ if (c->expr->expr_type == EXPR_FUNCTION
+ && c->expr->ts.type == BT_UNKNOWN
+ && strcmp (c->expr->symtree->name, "null") == 0)
+ {
+ gfc_error ("Incompatiable typespec for array element at %L",
+ &c->expr->where);
+ return MATCH_ERROR;
+ }
+ }
+ }
}
else
expr = gfc_get_array_expr (BT_UNKNOWN, 0, &where);
@@ -1171,6 +1200,7 @@ done:
expr->ts.u.cl->length_from_typespec = seen_ts;
*result = expr;
+
return MATCH_YES;
syntax:
Index: gcc/testsuite/gfortran.dg/pr67803.f90
===================================================================
--- gcc/testsuite/gfortran.dg/pr67803.f90 (nonexistent)
+++ gcc/testsuite/gfortran.dg/pr67803.f90 (working copy)
@@ -0,0 +1,14 @@
+! { dg-do compile }
+! PR fortran/67803
+! Original code submitted by Gerhard Steinmetz
+! <gerhard dot steinmetz dot fortran at t-online dot de >
+!
+program p
+ character(2) :: x(1)
+ x = '0' // [character :: 1] ! { dg-error "Incompatiable typespec for" }
+ x = '0' // [character :: 1.] ! { dg-error "Incompatiable typespec for" }
+ x = '0' // [character :: 1d1] ! { dg-error "Incompatiable typespec for" }
+ x = '0' // [character :: (0.,1.)] ! { dg-error "Incompatiable typespec for" }
+ x = '0' // [character :: .true.] ! { dg-error "Incompatiable typespec for" }
+ x = '0' // [character :: null()] ! { dg-error "Incompatiable typespec for" }
+end
