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Bug 797481 - crash on close of unsaved tabs by pressing [X]

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My original fix for this was a bit off, the problem wasn't that
the sheet had been freed, it was that the item_edit had so the
ptr to the sheet was garbage. The correct solution is to catch
the item_edit's "destroy" signal and remove the idles.

This commit replaces b5fdcfcb5.
This commit is contained in:
John Ralls 2020-03-27 16:18:47 -07:00
parent 655e9cd8eb
commit 1d91873ef2
1 changed files with 10 additions and 31 deletions
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41
gnucash/register/register-gnome/gnucash-item-edit.c
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@ -61,7 +61,7 @@ enum
static GtkBoxClass *gnc_item_edit_parent_class;
static GtkToggleButtonClass *gnc_item_edit_tb_parent_class;
static void gnc_item_edit_destroying(GtkWidget *this, gpointer data);
static void
gnc_item_edit_tb_init (GncItemEditTb *item_edit_tb)
{
@ -662,28 +662,6 @@ gnc_item_edit_get_property (GObject *object,
}
}
/* FIXME: Idle events calling gnc_item_edit_update can fire after the
* GncItemEdit is finalized, but because the GncItemEdit class is
* defined by hand instead of with the GType macros there's no way to
* run gnc_item_edit_dispose or gnc_item_edit_finalize to null out the
* pointers. We resort instead to a weak reference to null out the
* sheet when it gets finalized to prevent gnc_item_edit_upate from
* accessing the freed sheet.
*
* https://bugs.gnucash.org/show_bug.cgi?id=797481
*
* Note that this is still not bulletproof, after all we're still
* using the GncItemEdit after it has been freed but without a dispose
* function to do this correctly we're a bit stuck.
*/
static void
sheet_destroyed (gpointer data, GObject *table)
{
GncItemEdit *item_edit = (GncItemEdit*)data;
if (item_edit)
item_edit->sheet = NULL;
}
static void
gnc_item_edit_set_property (GObject *object,
guint param_id,
@ -694,15 +672,7 @@ gnc_item_edit_set_property (GObject *object,
switch (param_id)
{
case PROP_SHEET:
if (item_edit->sheet)
g_object_weak_unref(G_OBJECT(item_edit->sheet),
(GWeakNotify)sheet_destroyed,
(gpointer)item_edit);
item_edit->sheet = GNUCASH_SHEET (g_value_get_object (value));
if (item_edit->sheet)
g_object_weak_ref(G_OBJECT(item_edit->sheet),
(GWeakNotify)sheet_destroyed,
(gpointer)item_edit);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
@ -970,9 +940,18 @@ gnc_item_edit_new (GnucashSheet *sheet)
gtk_box_pack_start (GTK_BOX(item_edit), vb, FALSE, FALSE, 0);
gtk_widget_show_all(GTK_WIDGET(item_edit));
g_signal_connect(G_OBJECT(item_edit), "destroy",
G_CALLBACK(gnc_item_edit_destroying), NULL);
return GTK_WIDGET(item_edit);
}
static void
gnc_item_edit_destroying(GtkWidget *item_edit, gpointer data)
{
while (g_idle_remove_by_data((gpointer)item_edit))
continue;
}
static void
check_popup_height_is_true (GtkWidget *widget,
GdkRectangle *allocation,