From 6583ad7f4f57e65c9193481afd936566ada94fc3 Mon Sep 17 00:00:00 2001
From: Lukas Oberhuber <lukaso@gmail.com>
Date: Tue, 11 Jan 2022 23:01:08 +0000
Subject: [PATCH] girepository: avoids segfault in case of bad gtype

If a <GType invalid> (that's the way it appears in python's debugger) is
returned, `g_type_name` returns NULL. This
function therefore returns NULL at this time
as subsequent calls to `strlen( data->gtype_name)` segfault.
---
 girepository.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/girepository.c b/girepository.c
index 7d0348598..d7f6ceb4d 100644
--- a/girepository.c
+++ b/girepository.c
@@ -806,12 +806,14 @@ find_by_gtype (GHashTable *table, FindByGTypeData *data, gboolean check_prefix)
  */
 GIBaseInfo *
 g_irepository_find_by_gtype (GIRepository *repository,
-			     GType         gtype)
+                             GType         gtype)
 {
   FindByGTypeData data;
   GIBaseInfo *cached;
   DirEntry *entry;
 
+  g_return_val_if_fail (gtype != G_TYPE_INVALID, NULL);
+
   repository = get_repository (repository);
 
   cached = g_hash_table_lookup (repository->priv->info_by_gtype,