GLib-GIO-CRITICAL **: g_dbus_proxy_call_finish_internal: assertion 'error == NULL || *error == NULL' failed

[Ali]

Hi Francesco,

This effectively can happen, the call might fail and it does not set a 
reason for the failure. I assume you are initializing your error 
pointer, you can like the following

...
GError *error = NULL;
result = g_dbus_proxy_call_finish(proxy, res, &error); if  (error != NULL) {
     g_warning("... %s", error->message);
     g_error_free(error);
     return;
}

if  (result == NULL) {
   g_warning("Failed with no specific error");
   return;
}

Cheers,
Ali

On 04/29/2017 05:26 PM, Francesco Pasa wrote:
> Hi All,
>
> I am debugging the GTK3 port of Thunar. We have a rather serious bug 
> affecting almost all file operations (copy, rename, move, etc), which 
> results in a crash (segfault) of the program. I debugged a little and 
> it seems that the error is coming from the funtion
>
> GVariant <https://developer.gnome.org/gio/glib-GVariant.html#GVariant>  *
> g_dbus_proxy_call_finish (/|GDBusProxy <https://developer.gnome.org/gio/stable/GDBusProxy.html> 
> *proxy|/,
>                            /|GAsyncResult 
> <https://developer.gnome.org/gio/stable/GAsyncResult.html> *res|/,
>                            /|GError 
> <https://developer.gnome.org/gio/glib-Error-Reporting.html#GError> 
> **error|/);
> which is supposed to return NULL in case of errors, and fill the error 
> pointer with a description of the error. It does return NULL, but the 
> error pointer seems to be uninitialized (the bug goes away if I 
> manually fill the error pointer with some random data and g_error_new).
>
> Does somebody now if this is a bug in glib?
>
> Thanks in advance,
> Francesco Pasa
>
>
>
>
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> Xfce4-dev at xfce.org
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