Comment 2 for bug 1732906

StacktraceTop:
 _int_malloc (av=av@entry=0x7f5c8e27dc20 <main_arena>, bytes=bytes@entry=72) at malloc.c:3611
 __libc_calloc (n=n@entry=1, elem_size=elem_size@entry=72) at malloc.c:3438
 g_malloc0 (n_bytes=n_bytes@entry=72) at ../../../../glib/gmem.c:124
 g_closure_new_simple (sizeof_closure=sizeof_closure@entry=40, data=data@entry=0x5565e16554a0) at ../../../../gobject/gclosure.c:214
 g_cclosure_new (callback_func=0x7f5c8fe70fd0 <gtk_window_on_composited_changed>, user_data=0x5565e16554a0, destroy_data=0x0) at ../../../../gobject/gclosure.c:944