Нажимаем Alt-F2, появляется окно запуска команды, которое через секунду закрывается с большим количеством одинаковых сообщений в консоль (xfce4-appfinder:8275): GLib-CRITICAL **: 14:00:38.106: g_utf8_casefold: assertion 'str != NULL' failed (xfce4-appfinder:8275): GLib-CRITICAL **: 14:00:38.106: g_utf8_casefold: assertion 'str != NULL' failed (xfce4-appfinder:8275): GLib-CRITICAL **: 14:00:38.107: g_utf8_casefold: assertion 'str != NULL' failed (xfce4-appfinder:7481): GLib-CRITICAL **: 13:58:27.755: g_utf8_collate: assertion 'str2 != NULL' failed (xfce4-appfinder:7481): GLib-CRITICAL **: 13:58:27.755: g_utf8_collate: assertion 'str1 != NULL' failed xfce4-appfinder-4.13.1-alt1.x86_64
Нашёл что-то похожее: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=756770 Наконец дошло, что это Segfault. Запустил через gdb и получил: Program received signal SIGSEGV, Segmentation fault. 0x0000003da1680c03 in _g_utf8_normalize_wc (str=0x0, max_len=max_len@entry=-1, mode=mode@entry=G_NORMALIZE_ALL) at gunidecomp.c:372 372 while ((max_len < 0 || p < str + max_len) && *p) (gdb) bt #0 0x0000003da1680c03 in _g_utf8_normalize_wc (str=0x0, max_len=max_len@entry=-1, mode=mode@entry=G_NORMALIZE_ALL) at gunidecomp.c:372 #1 0x0000003da168113b in g_utf8_normalize (str=<optimized out>, len=len@entry=-1, mode=mode@entry=G_NORMALIZE_ALL) at gunidecomp.c:533 #2 0x0000000000412065 in xfce_appfinder_window_sort_items (model=0x87f950, a=0x7fffffffd3c0, b=0x7fffffffd3e0, data=<optimized out>) at appfinder-window.c:1954 #3 0x00007ffff77be76e in gtk_tree_model_sort_compare_func (a=<optimized out>, b=<optimized out>, user_data=0x7fffffffd520) at gtktreemodelsort.c:1842 #4 0x0000003da1667c6d in node_find_closest (haystack=0x9f5530, needle=needle@entry=0xa12e00, end=0x745130, iter_cmp=iter_cmp@entry=0x3da16678f0 <iter_compare>, cmp_data=cmp_data@entry=0x7fffffffd4c0) at gsequence.c:1799 #5 0x0000003da16680fe in node_insert_sorted (node=<optimized out>, new=new@entry=0xa12e00, end=<optimized out>, iter_cmp=iter_cmp@entry=0x3da16678f0 <iter_compare>, cmp_data=cmp_data@entry=0x7fffffffd4c0) at gsequence.c:2037 #6 0x0000003da1669004 in g_sequence_insert_sorted_iter (seq=0x8a9790, data=<optimized out>, iter_cmp=iter_cmp@entry=0x3da16678f0 <iter_compare>, cmp_data=cmp_data@entry=0x7fffffffd4c0) at gsequence.c:1050 #7 0x0000003da16690c8 in g_sequence_insert_sorted (seq=<optimized out>, data=data@entry=0xa13040, cmp_func=cmp_func@entry=0x7ffff77be710 <gtk_tree_model_sort_compare_func>, cmp_data=<optimized out>) at gsequence.c:740 #8 0x00007ffff77c17a9 in gtk_tree_model_sort_insert_value (s_iter=0x7fffffffd500, s_path=0x788d80, level=0x8a7650, tree_model_sort=0x869e50) at gtktreemodelsort.c:2074 #9 gtk_tree_model_sort_row_inserted (s_model=<optimized out>, s_path=0x788d80, s_iter=<optimized out>, data=0x869e50) at gtktreemodelsort.c:971 #10 0x0000003da1a109ed in g_closure_invoke (closure=0x89ad10, return_value=0x0, n_param_values=3, param_values=0x7fffffffd750, invocation_hint=0x7fffffffd6f0) at gclosure.c:804 #11 0x0000003da1a231ce in signal_emit_unlocked_R (node=node@entry=0x7fffe800ded0, detail=detail@entry=0, instance=instance@entry=0x87f950, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fffffffd750) at gsignal.c:3635 #12 0x0000003da1a2b7b5 in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fffffffd928) at gsignal.c:3391 #13 0x0000003da1a2c182 in g_signal_emit (instance=instance@entry=0x87f950, signal_id=<optimized out>, detail=detail@entry=0) at gsignal.c:3447 #14 0x00007ffff77b7e70 in gtk_tree_model_row_inserted (tree_model=tree_model@entry=0x87f950, path=path@entry=0x788d80, iter=iter@entry=0x7fffffffda10) at gtktreemodel.c:1855 #15 0x00007ffff77bd241 in gtk_tree_model_filter_emit_row_inserted_for_path (filter=filter@entry=0x87f950, c_model=c_model@entry=0x6d8b40, c_path=c_path@entry=0x786000, c_iter=c_iter@entry=0x7d1300) at gtktreemodelfilter.c:1954 #16 0x00007ffff77bd933 in gtk_tree_model_filter_row_inserted (c_model=0x6d8b40, c_path=0x786000, c_iter=0x7d1300, data=0x87f950) at gtktreemodelfilter.c:2283 #17 0x0000003da1a109ed in g_closure_invoke (closure=0x89b100, return_value=0x0, n_param_values=3, param_values=0x7fffffffdd30, invocation_hint=0x7fffffffdcd0) at gclosure.c:804 #18 0x0000003da1a231ce in signal_emit_unlocked_R (node=node@entry=0x7fffe800ded0, detail=detail@entry=0, instance=instance@entry=0x6d8b40, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fffffffdd30) at gsignal.c:3635 #19 0x0000003da1a2b7b5 in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fffffffdf08) at gsignal.c:3391 #20 0x0000003da1a2c182 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=detail@entry=0) at gsignal.c:3447 #21 0x00007ffff77b7e70 in gtk_tree_model_row_inserted (tree_model=<optimized out>, path=path@entry=0x786000, iter=iter@entry=0x7fffffffdfe0) at gtktreemodel.c:1855 #22 0x000000000040df18 in xfce_appfinder_model_collect_idle (user_data=<optimized out>) at appfinder-model.c:757 #23 0x00007ffff71c6700 in gdk_threads_dispatch (data=0x7ab560) at gdk.c:743 #24 0x0000003da164ee35 in g_main_dispatch (context=0x65f270) at gmain.c:3176 #25 g_main_context_dispatch (context=context@entry=0x65f270) at gmain.c:3829 #26 0x0000003da164f1d8 in g_main_context_iterate (context=0x65f270, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3902 #27 0x0000003da164f4e2 in g_main_loop_run (loop=0x8ce6a0) at gmain.c:4098 #28 0x00007ffff76af385 in gtk_main () at gtkmain.c:1323 #29 0x0000000000409e73 in main (argc=<optimized out>, argv=<optimized out>) at main.c:313 (gdb)
xfce_appfinder_window_sort_items вызывает g_utf8_normalize для нулевого указателя здесь: 1953 gtk_tree_model_get (model, b, XFCE_APPFINDER_MODEL_COLUMN_TITLE, &title_b, -1); 1954 normalized = g_utf8_normalize (title_b, -1, G_NORMALIZE_ALL); 1955 title_b = g_utf8_casefold (normalized, -1); 1956 g_free (normalized); После (gdb) break appfinder-window.c:1954 if title_b == 0 обнаружилось (gdb) print title_a $2 = (gchar *) 0xa10c00 "audacity" (gdb) print title_b $3 = (gchar *) 0x0 b - это итератор по GtkTreeIter https://developer.gnome.org/gtk3/3.20/GtkTreeModel.html#gtk-tree-model-get
Created attachment 7731 [details] desktop-файл, с которым падает xfce4-appfinder Скорее всего, воспроизводится только у меня из-за какого-то левого desktop-файла. Я даже нашёл его и прикладываю. Завёл багу в апстриме https://bugzilla.xfce.org/show_bug.cgi?id=14655
xfce4-appfinder-4.13.1-alt2 -> sisyphus: Tue Sep 04 2018 Mikhail Efremov <sem@altlinux> 4.13.1-alt2 - Ignore menu items without name (closes: #35328).
