- Trying to slice an indexable type leads to misleading error message #2958

releasenotes.md

@@ -48,6 +48,7 @@
 - On assert known false, the message was not show for no-args.
 - Adding the incorrect sized vector to a pointer vector would cause a crash.
 - Member access on a struct returned by the assignment expression, cause crash #2947
+- Trying to slice an indexable type leads to misleading error message #2958
 
 ## 0.7.9 Change list
 

src/compiler/sema_expr.c

@@ -4848,7 +4848,7 @@ static inline bool sema_expr_analyse_slice(SemaContext *context, Expr *expr)
 
 	if (!inner_type || !type_is_valid_for_array(inner_type))
 	{
-		RETURN_SEMA_ERROR(subscripted, "Cannot index %s.", type_quoted_error_string(subscripted->type));
+		RETURN_SEMA_ERROR(subscripted, "You cannot slice %s.", type_quoted_error_string(subscripted->type));
 	}
 	if (current_expr != subscripted)
 	{

test/test_suite/arrays/slice_no_overload.c3

@@ -0,0 +1,8 @@
+import std;
+
+fn int main()
+{
+	List {int} int_list;
+	int[] int_slice = int_list[..]; // #error:  You cannot slice 'List{int}'
+	return 0;
+}