GTK+ Forums

Joel · Posted: Fri Jun 13, 2008 11:08 pm Post subject: Ok, this is weird :\

I got a warning:

Code: (C)
1 2 3 4 5 6 7 8	void OnButton1Clicked(GtkWidget widget, gpointer entry) { GtkWidget Entry = GTK_WIDGET(entry); gchar texto = (gchar)gtk_entry_get_text(Entry); // line error g_print("%s\n", texto); g_free(texto); }

The error is something about incompatible pointer, The function is called from:

Code: (C)
1 2 3 4 5	entry1 = gtk_entry_new(); //... g_signal_connect(G_OBJECT(button1), "clicked", G_CALLBACK(OnButton1Clicked), entry1);

The first time prints into the terminal correctly the inputed text, but 2nd time prints a tons of lines like

Quote:

double free or corruption (fasttop): 0x08097d78 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6[0xb78dba85]
/lib/tls/i686/cmov/libc.so.6(cfree+0x90)[0xb78df4f0]
/usr/lib/libglib-2.0.so.0(g_free+0x31)[0xb79fe8b1]
/usr/lib/libglib-2.0.so.0[0xb79f694e]

and so on... :cry:
Any ideas? Thanks.

dreblen · Posted: Fri Jun 13, 2008 11:53 pm Post subject:

it's because you're freeing texto.
see the "Returns:" section of this page to see what you can and can't do:
http://library.gnome.org/devel/gtk/stable/GtkEntry.html#gtk-entry-get-text

as far as the warning about incompatible pointers, try passing '(gpointer)entry1' to g_signal_connect instead of 'entry1'

Joel · Posted: Sat Jun 14, 2008 1:58 am Post subject: