From 4e61fc48f58c16427593ded7fdd0ff49bed897b0 Mon Sep 17 00:00:00 2001 From: Piotr Trojanek Date: Wed, 23 Aug 2023 16:02:21 +0200 Subject: [PATCH] ada: Add guard before querying the type for its interfaces Fix crash on illegal code, when routine Iface_Present_In_Ancestor is called on the predefined String type and attempts to examine the list of interfaces. gcc/ada/ * sem_type.adb (Iface_Present_In_Ancestor): Only look at the list of interfaces for types that allow it. The guard is a high-level equivalent of the entity kinds listed in the preconditon of the Interfaces query. --- gcc/ada/sem_type.adb | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/gcc/ada/sem_type.adb b/gcc/ada/sem_type.adb index bbdcd5f24b8..8579130cdac 100644 --- a/gcc/ada/sem_type.adb +++ b/gcc/ada/sem_type.adb @@ -2578,7 +2578,9 @@ package body Sem_Type is end if; loop - if Present (Interfaces (E)) then + if Is_Record_Type (E) + and then Present (Interfaces (E)) + then Elmt := First_Elmt (Interfaces (E)); while Present (Elmt) loop AI := Node (Elmt);