===================================================================
@@ -1486,10 +1486,14 @@ gfc_set_constant_character_len (int len,
gfc_char_t *s;
int slen;
- gcc_assert (expr->expr_type == EXPR_CONSTANT);
-
if (expr->ts.type != BT_CHARACTER)
return;
+
+ if (expr->expr_type != EXPR_CONSTANT)
+ {
+ gfc_error_now ("CHARACTER length must be a constant at %L", &expr->where);
+ return;
+ }
slen = expr->value.character.length;
if (len != slen)
===================================================================
@@ -0,0 +1,6 @@
+! { dg-do compile }
+program p
+ integer :: n = 1
+ character(3), parameter :: x(2) = ['abc', 'xyz']
+ character(2), parameter :: y(2) = [x(2)(2:3), x(n)(1:2)] ! { dg-error "CHARACTER length must be a constant" }
+end