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https://gitlab.gnome.org/GNOME/glib/-/commit/ea3f17d598d550345e94e4571130e429443e91cb
https://gitlab.gnome.org/GNOME/glib/-/issues/2770
From: Emmanuele Bassi <ebassi@gnome.org>
Date: Sun, 25 Sep 2022 14:20:24 +0100
Subject: [PATCH] Empty values are not valid GParamSpec
The validate() vfunc for GParamSpecParam returns FALSE for empty GValue,
which means the is_valid() vfunc should do the same.
This avoids a segfault when calling g_param_value_is_valid() on a
GParamSpecParam.
Fixes: #2770
--- a/gobject/gparamspecs.c
+++ b/gobject/gparamspecs.c
@@ -894,6 +894,9 @@ param_param_is_valid (GParamSpec *pspec,
{
GParamSpec *param = value->data[0].v_pointer;
+ if (param == NULL)
+ return FALSE;
+
return g_value_type_compatible (G_PARAM_SPEC_TYPE (param), G_PARAM_SPEC_VALUE_TYPE (pspec));
}
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