GLib-CRITICAL **：试图删除它时未找到源ID XXX [英] GLib-CRITICAL **: Source ID XXX was not found when attempting to remove it

问题描述

我用treestore作为模型创建了一个treeview。该窗口按预期显示，但当我点击+展开项目时，我收到以下消息：

GLib-CRITICAL **：源ID为221尝试删除它时未找到

以下是我的代码：

  #include< gtk / gtk.h> 
 $ b $ *编译时加上：* / 
 / * gcc main.c -o boxy`pkg-config --cflags --libs gtk + -2.0` * / 
 
 typedef struct {
 GtkWidget * toplevel; 
 GtkWidget * treeview; 
}小工具; 
 
 enum {ITEM_PARENT，ITEM_CHILD}; 
 
 typedef struct {
 gint tipo; 
 gint id; 
 gchar * nombre; 
 gint cantidad; 
} Lista; 
 $ b $ void addColumn（GtkTreeView * tv，const gchar * title，gint pos）{
 GtkCellRenderer * tmp; 
 tmp = gtk_cell_renderer_text_new（）; 
 g_object_set（tmp，editable，TRUE，editable-set，TRUE，NULL）; 
 gtk_tree_view_insert_column_with_attributes（tv，-1，title，tmp，text，pos，NULL）; 
} 
 
 void setupTree（GtkTreeView * tv）{
 const Lista lista [] = {
 {ITEM_PARENT，125，超人，2}，
 {ITEM_CHILD，23，蝙蝠侠，1}，
 {ITEM_CHILD，7，绿巨人，5}，
 {ITEM_PARENT，65，钢铁侠，2}，
 {-1，-1，NULL，-1} 
}; 
 GtkTreeStore * model; 
 GtkTreeIter last; 
 gint pos; 
 model = gtk_tree_store_new（3，G_TYPE_INT，G_TYPE_STRING，G_TYPE_INT）; 
 addColumn（tv，ID，0）; 
 addColumn（tv，Nombre，1）; 
 addColumn（tv，Cantidad，2）; 
 for（pos = 0; lista [pos] .tipo！= -1; pos ++）{
 GtkTreeIter iter; 
 if（lista [pos] .tipo == ITEM_PARENT）{
 gtk_tree_store_append（model，&iter，NULL）; 
 last = iter; 
} else if（lista [pos] .tipo == ITEM_CHILD）{
 gtk_tree_store_append（model，&iter，& last）; 
} 
 gtk_tree_store_set（model，& iter，0，lista [pos] .id，1，lista [pos] .nombre，2，lista [pos] .cantidad，-1）; 
} 
 gtk_tree_view_set_model（tv，GTK_TREE_MODEL（model））; 
 g_object_unref（model）; 
} 
 
 int main（int argc，char * argv []）{
 Widgets * ptr; 
 GtkWidget * scroll; 
 gtk_init（& argc，& argv）; 
 ptr = g_slice_new0（Widgets）; 
 ptr-> toplevel = gtk_window_new（GTK_WINDOW_TOPLEVEL）; 
 scroll = gtk_scrolled_window_new（NULL，NULL）; 
 gtk_scrolled_window_set_policy（GTK_SCROLLED_WINDOW（滚动），GTK_POLICY_AUTOMATIC，GTK_POLICY_AUTOMATIC）; 
 gtk_scrolled_window_set_shadow_type（GTK_SCROLLED_WINDOW（scroll），GTK_SHADOW_OUT）; 
 ptr-> treeview = gtk_tree_view_new（）; 
 setupTree（GTK_TREE_VIEW（ptr-> treeview））; 
 
 g_signal_connect（ptr-> toplevel，destroy，G_CALLBACK（gtk_main_quit），NULL）; 
 
 gtk_container_set_border_width（GTK_CONTAINER（ptr-> toplevel），10）; 
 gtk_container_add（GTK_CONTAINER（scroll），ptr-> treeview）; 
 gtk_container_add（GTK_CONTAINER（ptr-> toplevel），scroll）; 
 gtk_widget_show_all（ptr-> toplevel）; 
 gtk_main（）; 
 g_slice_free（Widgets，ptr）; 
返回0; 
} 
  

有什么想法？

解决方案

这不是代码中的错误，也不是崩溃。它实际上只是一个警告，调用 g_source_remove（）来断开已经断开连接的某个事件处理程序，在这种情况下，它是属于gtk一部分的代码。

警告本身是在glib 2.39中引入的，在此提交，似乎只有拱门Linux用户受到影响，因为其他发行版尚未更新。

在大多数情况下，这是完全无害的，只是一个烦恼。可能值得一看，如果它源于你自己的代码中 g_source_remove（）调用。

设置断点在g_log上查找是什么导致它：

 （gdb）break g_log 
断点1在0x7ffff5ea5a70 
 gdb）c 
继续。 
 
断点1，位于/usr/lib/libglib-2.0.so.0的g_log（）中的0x00007ffff5ea5a70 $ b $（gdb）bt 
＃0 0x00007ffff5ea5a70 in g_log（）from / usr / lib / libglib-2.0.so.0 
＃1 0x00007ffff5e9d9dc in /_sr/lib/libglib-2.0.so.0 $ g $ source_remove（）
＃2 0x00007ffff79bd0f5 in ?? （）from /usr/lib/libgtk-x11-2.0.so.0 
＃3 0x00007ffff79cc1a4 in ?? （）from /usr/lib/libgtk-x11-2.0.so.0 
＃4 0x00007ffff79cda66 in ?? （）from /usr/lib/libgtk-x11-2.0.so.0 
＃5 0x00007ffff78d7435 in ?? （）从/usr/lib/libgtk-x11-2.0.so.0 
＃6 0x00007ffff616e3d8在/usr/lib/libgobject-2.0.so.0 g_closure_invoke（）中
＃7 0x00007ffff617fb1b in？ ？ （）from /usr/lib/libgobject-2.0.so.0 
＃8 0x00007ffff6187719 in g_signal_emit_valist（）from /usr/lib/libgobject-2.0.so.0 
＃9 0x00007ffff6187d02 in g_signal_emit（） from /usr/lib/libgobject-2.0.so.0 
＃10 0x00007ffff79e6fe4 in ?? （）from /usr/lib/libgtk-x11-2.0.so.0 
＃11 0x00007ffff78d5be4 in gtk_propagate_event（）from /usr/lib/libgtk-x11-2.0.so.0 
＃12 0x00007ffff78d5f9b在/usr/lib/libgtk-x11-2.0.so.0中的gtk_main_do_event（）中b $ b＃13 0x00007ffff75519cc in ?? （）从/usr/lib/libgdk-x11-2.0.so.0 
＃14 0x00007ffff5e9eb84 in g_main_context_dispatch（）from /usr/lib/libglib-2.0.so.0 
＃15 0x00007ffff5e9edc8 in？ ？ （）从/usr/lib/libglib-2.0.so.0 
＃16 0x00007ffff5e9f08a在/usr/lib/libglib-2.0.so.0 $ g $ main_loop_run（）中
＃17 0x00007ffff78d5087在gtk_main（） from /usr/lib/libgtk-x11-2.0.so.0 
＃18 0x000000000040152f in main（）
  

回溯从gtk_main一直到g_log，而无需在代码中传递一次，所以这可能会影响任何带有树视图的gtk程序。

I made a treeview with a treestore as model. The window is showd as expected, but when I click in the "+" to expand the items I get this message:

GLib-CRITICAL **: Source ID 221 was not found when attempting to remove it

Here is my code:

#include <gtk/gtk.h>

/* compile with: */
/* gcc main.c -o boxy `pkg-config --cflags --libs gtk+-2.0` */

typedef struct {
GtkWidget *toplevel;
GtkWidget *treeview;
} Widgets;

enum { ITEM_PARENT, ITEM_CHILD };

typedef struct {
gint tipo;
gint id;
gchar *nombre;
gint cantidad;
} Lista;

void addColumn (GtkTreeView *tv, const gchar* title, gint pos) {
GtkCellRenderer *tmp;
tmp = gtk_cell_renderer_text_new ();
g_object_set (tmp, "editable", TRUE, "editable-set", TRUE, NULL);
gtk_tree_view_insert_column_with_attributes (tv, -1, title, tmp, "text", pos, NULL);
}

void setupTree (GtkTreeView *tv) {
const Lista lista[] = {
    {ITEM_PARENT, 125, "Superman", 2},
    {ITEM_CHILD, 23, "Batman", 1},
    {ITEM_CHILD, 7, "Hulk", 5},
    {ITEM_PARENT, 65, "Iron Man", 2},
    {-1, -1, NULL, -1}
};
GtkTreeStore *model;
GtkTreeIter last;
gint pos;
model = gtk_tree_store_new (3, G_TYPE_INT, G_TYPE_STRING, G_TYPE_INT);
addColumn (tv, "ID", 0);
addColumn (tv, "Nombre", 1);
addColumn (tv, "Cantidad", 2);
for (pos = 0; lista[pos].tipo != -1; pos++) {
    GtkTreeIter iter;
    if (lista[pos].tipo == ITEM_PARENT) {
        gtk_tree_store_append (model, &iter, NULL);
        last = iter;
    } else if (lista[pos].tipo == ITEM_CHILD) {
        gtk_tree_store_append (model, &iter, &last);
    }
    gtk_tree_store_set (model, &iter, 0, lista[pos].id, 1, lista[pos].nombre, 2, lista[pos].cantidad, -1);
}
gtk_tree_view_set_model (tv, GTK_TREE_MODEL (model));
g_object_unref (model);
}

int main (int argc, char *argv[]) {
Widgets *ptr;
GtkWidget *scroll;
gtk_init (&argc, &argv);
ptr = g_slice_new0(Widgets);
ptr->toplevel = gtk_window_new (GTK_WINDOW_TOPLEVEL);
scroll = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scroll), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scroll), GTK_SHADOW_OUT);
ptr->treeview = gtk_tree_view_new ();
setupTree (GTK_TREE_VIEW (ptr->treeview));

g_signal_connect (ptr->toplevel, "destroy", G_CALLBACK (gtk_main_quit), NULL);

gtk_container_set_border_width (GTK_CONTAINER (ptr->toplevel), 10);
gtk_container_add (GTK_CONTAINER (scroll), ptr->treeview);
gtk_container_add (GTK_CONTAINER (ptr->toplevel), scroll);
gtk_widget_show_all (ptr->toplevel);
gtk_main ();
g_slice_free (Widgets, ptr);
return 0;
}

Any ideas?

解决方案

This isn't a bug in your code, and it's not a crash either. It's actually just a warning that g_source_remove() was called to disconnect a certain event handler that was already disconnected, in this case, in code that is part of gtk.

The warning itself was introduced in glib 2.39, in this commit, and seems like only arch linux users are affected by it because other distros haven't updated yet.

In most cases this is completely harmless, and only an annoyance. Might be worth a look if it originates with a g_source_remove() call in your own code.

Set a breakpoint on g_log to find what's causing it:

(gdb) break g_log
Breakpoint 1 at 0x7ffff5ea5a70
(gdb) c
Continuing.

Breakpoint 1, 0x00007ffff5ea5a70 in g_log () from /usr/lib/libglib-2.0.so.0
(gdb) bt
#0  0x00007ffff5ea5a70 in g_log () from /usr/lib/libglib-2.0.so.0
#1  0x00007ffff5e9d9dc in g_source_remove () from /usr/lib/libglib-2.0.so.0
#2  0x00007ffff79bd0f5 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#3  0x00007ffff79cc1a4 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#4  0x00007ffff79cda66 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#5  0x00007ffff78d7435 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#6  0x00007ffff616e3d8 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#7  0x00007ffff617fb1b in ?? () from /usr/lib/libgobject-2.0.so.0
#8  0x00007ffff6187719 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#9  0x00007ffff6187d02 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#10 0x00007ffff79e6fe4 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#11 0x00007ffff78d5be4 in gtk_propagate_event () from /usr/lib/libgtk-x11-2.0.so.0
#12 0x00007ffff78d5f9b in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0
#13 0x00007ffff75519cc in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#14 0x00007ffff5e9eb84 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#15 0x00007ffff5e9edc8 in ?? () from /usr/lib/libglib-2.0.so.0
#16 0x00007ffff5e9f08a in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#17 0x00007ffff78d5087 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#18 0x000000000040152f in main ()

The backtrace goes all the way from gtk_main to g_log without passing a single time through your code, so this probably affects any gtk program with a treeview.

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