This message dialog causes a strange behavior on my program. It seems that the call to gtk_message_dialog_new() change the value of the const gchar* pointer, last parameter.
Furthermore, the value of the const gchar* variable "message" change from "Il risultato e' -number-" to "Il risult(", I don't know why.
I know that the call changes the value (and the address) of message because I use gdb.
I develope on ubuntu gnome 13.10 using Code::Blocks , on a 64bit system, with gtk+-3.0
const gchar* message;
/*the function risolviFormat() create a gchar* pointer, using malloc to allocate memory */
message = espressione->risolviFormat(); //message is, for example, "Il risultato e' 789"
dialog = gtk_message_dialog_new (NULL,
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_INFO,
GTK_BUTTONS_OK,
message);
/*now message is "Il risult("
gtk_window_set_position(GTK_WINDOW(dialog),GTK_WIN_POS_CENTER_ALWAYS);
gtk_dialog_run (GTK_DIALOG (dialog));
gtk_widget_destroy (dialog);
/*this call causes a segfault because message pointer changed his value */
free(message);
return;
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