[glib/glib-2-64: 1/2] GWin32RegistryKey: Move assertions

[Sebastian Dröge <sdroege src gnome org>]

commit 98570e2d697102ebe3890e1c43d29567a9708ab9
Author: Руслан Ижбулатов <lrn1986 gmail com>
Date:   Thu Jun 4 18:06:36 2020 +0000

    GWin32RegistryKey: Move assertions
    
    While these assertions look right at the first glance,
    they actually crash the program. That's because GObject
    insists on initializing all construct-only properties
    to their default values, which results in
    g_win32_registry_key_set_property() being called multiple
    times with NULL string, once for each unset property.
    
    If "path" is actually set by the caller, a subsequent
    call to set "path-utf16" to NULL will fail an assertion,
    since absolute_path is already non-NULL.
    
    With assertions moved the set-to-NULL calls bail out before
    an assertion is made.

 gio/gwin32registrykey.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)
---
diff --git a/gio/gwin32registrykey.c b/gio/gwin32registrykey.c
index c19fede4e..aa7819294 100644
--- a/gio/gwin32registrykey.c
+++ b/gio/gwin32registrykey.c
@@ -2334,8 +2334,6 @@ g_win32_registry_key_set_property (GObject      *object,
   switch (prop_id)
     {
     case PROP_PATH:
-      g_assert (priv->absolute_path_w == NULL);
-      g_assert (priv->absolute_path == NULL);
       path = g_value_get_string (value);
 
       if (path == NULL)
@@ -2346,20 +2344,21 @@ g_win32_registry_key_set_property (GObject      *object,
       if (path_w == NULL)
         break;
 
-      g_free (priv->absolute_path_w);
-      g_free (priv->absolute_path);
+      /* Construct only */
+      g_assert (priv->absolute_path_w == NULL);
+      g_assert (priv->absolute_path == NULL);
       priv->absolute_path_w = path_w;
       priv->absolute_path = g_value_dup_string (value);
       break;
 
     case PROP_PATH_UTF16:
-      g_assert (priv->absolute_path_w == NULL);
-      g_assert (priv->absolute_path == NULL);
       path_w = (gunichar2 *) g_value_get_pointer (value);
 
       if (path_w == NULL)
         break;
 
+      /* Construct only */
+      g_assert (priv->absolute_path_w == NULL);
       priv->absolute_path_w = g_wcsdup (path_w, -1);
       break;