[USBTransport] BUSBRoster pure virtual method called on destruction

[korli]

WatchedEntry::~WatchedEntry () calls a method in BUSBRoster which is being destroyed, hence the pure virtual method call.

Thread 137 called debugger(): pure virtual method called

[Switching to team /boot/system/servers/print_server (137) thread print_server (137)]
0xffff0114 in ?? ()
(gdb) bt
#0  0xffff0114 in ?? ()
#1  0x0024f7fe in debugger () from /boot/system/lib/libroot.so
#2  0x0024bb7a in __pure_virtual () from /boot/system/lib/libroot.so
#3  0x01ab2d77 in WatchedEntry::~WatchedEntry ()
   from /boot/system/lib/libdevice.so
#4  0x01ab2d52 in WatchedEntry::~WatchedEntry ()
   from /boot/system/lib/libdevice.so
#5  0x01ab2d52 in WatchedEntry::~WatchedEntry ()
   from /boot/system/lib/libdevice.so
#6  0x01ab3314 in RosterLooper::Stop () from /boot/system/lib/libdevice.so
#7  0x01ab3632 in BUSBRoster::Stop () from /boot/system/lib/libdevice.so
#8  0x01ab350d in BUSBRoster::~BUSBRoster () from /boot/system/lib/libdevice.so
#9  0x01aa56fb in __static_initialization_and_destruction_0 ()
   from /boot/system/add-ons/Print/transport/USB Port
#10 0x01aa5752 in global destructors keyed to transport_features ()
   from /boot/system/add-ons/Print/transport/USB Port
#11 0x01aa4637 in __do_global_dtors_aux ()
   from /boot/system/add-ons/Print/transport/USB Port
#12 0x01aa6830 in _fini () from /boot/system/add-ons/Print/transport/USB Port
#13 0x0010183f in terminate_program () from /boot/system/runtime_loader
#14 0x002be0fc in exit () from /boot/system/lib/libroot.so
#15 0x0020ea3c in _start ()
#16 0x00105d56 in runtime_loader () from /boot/system/runtime_loader
#17 0x7ffeefec in ?? ()

BUSBRoster::Stop() should only be called before destruction.

[korli]

Implemented in hrev39685. Not yet tested.

[korli]

No problem reported so far. Closing.