Network crash on start/stop

[gavofyork]

#1835300 9e75…e30c      0 blk/s    0 tx/s   0 Mgas/s    0/ 0 peers   #1835300     0+    0 Qed     36 MiB db  213 KiB chain    2 KiB queue   29 KiB sync
2016-07-06 15:04:22 INFO:parity::io_handler: Starting network
2016-07-06 15:04:22 TRACE:host: Creating new Host object
#1835300 9e75…e30c      0 blk/s    0 tx/s   0 Mgas/s    0/ 0 peers   #1835300     0+    0 Qed     36 MiB db  213 KiB chain    2 KiB queue   29 KiB sync
2016-07-06 15:04:27 INFO:ethcore_util::network::host: Public node URL: enode://c6f1c77f5e219e5f93da5765568212009fd9b27a297fad59c2162559339f85ec72a07972dfd8242ece63aacabba690f1c83a33d79080444f6b94823cdcfe9526@192.168.178.166:30303
#1835300 9e75…e30c      0 blk/s    0 tx/s   0 Mgas/s    0/ 1 peers   #1835300     0+    0 Qed     36 MiB db   10 KiB chain    2 KiB queue   29 KiB sync
#1835300 9e75…e30c      0 blk/s    0 tx/s   0 Mgas/s    1/ 2 peers   #1835300     0+    0 Qed     36 MiB db   10 KiB chain    2 KiB queue   29 KiB sync
#1835300 9e75…e30c      0 blk/s    0 tx/s   0 Mgas/s    1/ 2 peers   #1835300     0+    0 Qed     36 MiB db   10 KiB chain    2 KiB queue   29 KiB sync
#1835302 4bea…a8ae      0 blk/s    0 tx/s   0 Mgas/s    0/ 3 peers   #1835302     0+    0 Qed     36 MiB db  107 KiB chain    2 KiB queue   29 KiB sync
2016-07-06 15:04:57 INFO:parity::io_handler: Stopping network
#1835302 4bea…a8ae      0 blk/s    0 tx/s   0 Mgas/s    0/ 0 peers   #1835302     0+    0 Qed     36 MiB db  107 KiB chain    2 KiB queue   29 KiB sync
2016-07-06 15:05:02 INFO:parity::io_handler: Starting network
2016-07-06 15:05:02 TRACE:host: Creating new Host object
#1835302 4bea…a8ae      0 blk/s    0 tx/s   0 Mgas/s    0/ 0 peers   #1835302     0+    0 Qed     36 MiB db  107 KiB chain    2 KiB queue   29 KiB sync
thread 'IO Worker #1' panicked at 'called `Option::unwrap()` on a `None` value', ../src/libcore/option.rs:326
stack backtrace:
   1:        0x10be85608 - std::sys::backtrace::tracing::imp::write::h4c73fcd3363076f5
   2:        0x10be8a2f5 - std::panicking::default_hook::_$u7b$$u7b$closure$u7d$$u7d$::h0422dbb3077e6747
   3:        0x10be89f2e - std::panicking::default_hook::haac48fa641db8fa2
   4:        0x10be70f06 - std::sys_common::unwind::begin_unwind_inner::h39d40f52add53ef7
   5:        0x10be71d8e - std::sys_common::unwind::begin_unwind_fmt::h64c0ff793199cc1b
   6:        0x10be848d7 - rust_begin_unwind
   7:        0x10beb12b0 - core::panicking::panic_fmt::h73bf9d7e8e891a73
   8:        0x10beb15ac - core::panicking::panic::hdbcf9a6d5c170498
   9:        0x10a8da28a - _<std..option..Option<T>>::unwrap::h51881ca9e2bffbd6
  10:        0x10a8d6202 - _<util..network..host..Host<Message> as util..IoHandler<util..NetworkIoMessage<Message>>>::timeout::h5dbcca98775b8e27
  11:        0x10af0f8d3 - ethcore_util::io::worker::Worker::do_work::h8f6c698f16ed7ae9
  12:        0x10af0e872 - ethcore_util::io::worker::Worker::work_loop::h7642fdd937fe2dcc
  13:        0x10af0e4aa - ethcore_util::io::worker::Worker::new::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::he799d3f7f4079546
  14:        0x10af0e2b4 - ethcore_util::panics::PanicHandler::catch_panic::h462959f824d47d7c
  15:        0x10af0def7 - ethcore_util::io::worker::Worker::new::_$u7b$$u7b$closure$u7d$$u7d$::h799a7bf75d5b3acc
  16:        0x10af0d89c - std::thread::Builder::spawn::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::hf32a0eccdf195304
  17:        0x10af0d80c - std::sys_common::unwind::try::try_fn::h3a0b3b9c5218fe37
  18:        0x10be8486b - __rust_try
  19:        0x10be847f3 - std::sys_common::unwind::inner_try::h9eebd8dc83f388a6
  20:        0x10af0d769 - std::sys_common::unwind::try::h9f77f49b3ff80f79
  21:        0x10af0d57e - std::thread::Builder::spawn::_$u7b$$u7b$closure$u7d$$u7d$::h39a4d1988435f0e8
  22:        0x10af0e18c - _<F as std..boxed..FnBox<A>>::call_box::h3212ffe73720f9c2
  23:        0x10be89488 - std::sys::thread::Thread::new::thread_start::h471ad90789353b5b
  24:     0x7fff8dc5a99c - _pthread_body
  25:     0x7fff8dc5a919 - _pthread_start
2016-07-06 15:05:04 INFO:parity: Finishing work, please wait...
2016-07-06 15:05:07 INFO:ethcore_util::network::host: Public node URL: enode://c6f1c77f5e219e5f93da5765568212009fd9b27a297fad59c2162559339f85ec72a07972dfd8242ece63aacabba690f1c83a33d79080444f6b94823cdcfe9526@192.168.178.166:30303
thread 'IO Worker #0' panicked at 'called `Result::unwrap()` on an `Err` value: "PoisonError { inner: .. }"', ../src/libcore/result.rs:746
stack backtrace:
   1:        0x10be85608 - std::sys::backtrace::tracing::imp::write::h4c73fcd3363076f5
   2:        0x10be8a2f5 - std::panicking::default_hook::_$u7b$$u7b$closure$u7d$$u7d$::h0422dbb3077e6747
   3:        0x10be89f2e - std::panicking::default_hook::haac48fa641db8fa2
   4:        0x10be70f06 - std::sys_common::unwind::begin_unwind_inner::h39d40f52add53ef7
   5:        0x10be71d8e - std::sys_common::unwind::begin_unwind_fmt::h64c0ff793199cc1b
   6:        0x10be848d7 - rust_begin_unwind
   7:        0x10beb12b0 - core::panicking::panic_fmt::h73bf9d7e8e891a73
   8:        0x10a859605 - core::result::unwrap_failed::h4dea0cb7c9248cd7
   9:        0x10a859338 - _<std..result..Result<T, E>>::unwrap::h25b61d097da001d5
  10:        0x10a8d86e1 - _<util..network..host..Host<Message>>::init_public_interface::h5c2a55e966fb889a
  11:        0x10a8d5f7c - _<util..network..host..Host<Message> as util..IoHandler<util..NetworkIoMessage<Message>>>::timeout::h5dbcca98775b8e27
  12:        0x10af0f8d3 - ethcore_util::io::worker::Worker::do_work::h8f6c698f16ed7ae9
  13:        0x10af0e872 - ethcore_util::io::worker::Worker::work_loop::h7642fdd937fe2dcc
  14:        0x10af0e4aa - ethcore_util::io::worker::Worker::new::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::he799d3f7f4079546
  15:        0x10af0e2b4 - ethcore_util::panics::PanicHandler::catch_panic::h462959f824d47d7c
  16:        0x10af0def7 - ethcore_util::io::worker::Worker::new::_$u7b$$u7b$closure$u7d$$u7d$::h799a7bf75d5b3acc
  17:        0x10af0d89c - std::thread::Builder::spawn::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::hf32a0eccdf195304
  18:        0x10af0d80c - std::sys_common::unwind::try::try_fn::h3a0b3b9c5218fe37
  19:        0x10be8486b - __rust_try
  20:        0x10be847f3 - std::sys_common::unwind::inner_try::h9eebd8dc83f388a6
  21:        0x10af0d769 - std::sys_common::unwind::try::h9f77f49b3ff80f79
  22:        0x10af0d57e - std::thread::Builder::spawn::_$u7b$$u7b$closure$u7d$$u7d$::h39a4d1988435f0e8
  23:        0x10af0e18c - _<F as std..boxed..FnBox<A>>::call_box::h3212ffe73720f9c2
  24:        0x10be89488 - std::sys::thread::Thread::new::thread_start::h471ad90789353b5b
  25:     0x7fff8dc5a99c - _pthread_body
  26:     0x7fff8dc5a919 - _pthread_start