StacktraceTop: g_type_check_instance_cast (type_instance=0x7f05c451bbf0, iface_type=139662721303488) at /build/buildd/glib2.0-2.37.3/./gobject/gtype.c:4008 calc_fine_scroll_multiplier (scrollbar=<optimized out>) at ../../../os/os-scrollbar.c:1334 ?? ()
StacktraceTop: check_instance_ cast (type_instance= 0x7f05c451bbf0, iface_type= 139662721303488 ) at /build/ buildd/ glib2.0- 2.37.3/ ./gobject/ gtype.c: 4008 scroll_ multiplier (scrollbar= <optimized out>) at ../../. ./os/os- scrollbar. c:1334
g_type_
calc_fine_
?? ()