Thread 0: lock: 
Thread 0: Cloning Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff547240 - arcdebug::ArcDebug<T>.Clone::clone::h3326700919404439755
                        at src/arcdebug.rs:33
   3:     0x7f5aff546f39 - tuple::_(A, B).Clone::clone::h10369886360165513904
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libcore/tuple.rs:56
   4:     0x7f5aff541e2d - LockSpace<K, V>::lock::h11658868991106758464
                        at src/lib.rs:260
   5:     0x7f5aff5390c2 - LockSpace<K, V>::with_lock::h9080770623883117772
                        at src/lib.rs:242
   6:     0x7f5aff538f46 - test::closure.3366
                        at src/bin/auto_cleanup.rs:22
   7:     0x7f5aff538ea8 - boxed::F.FnBox<A>::call_box::h8054860876095691231
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
   8:     0x7f5aff538a87 - boxed::Box<FnBox<A, Output $u3d$$u20$R$GT$$u2b$$u20$Send$u20$$u2b$$u20$$u27$a$GT$.FnOnce$LT$A$GT$::call_once::h767267329913727791
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:390
   9:     0x7f5aff538011 - thread::Builder::spawn_inner::closure.3309
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:351
  10:     0x7f5aff537f7e - rt::unwind::try::try_fn::__rust_abi::h11159915160843785131
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:139
  11:     0x7f5aff537f19 - rt::unwind::try::try_fn::h11159915160843785131
  12:     0x7f5aff55acf8 - rust_try_inner
  13:     0x7f5aff55ace5 - rust_try
  14:     0x7f5aff5373ba - rt::unwind::try::h6327546562003534004
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:125
  15:     0x7f5aff536fe7 - thread::Builder::spawn_inner::closure.3185
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:349
  16:     0x7f5aff538c8d - boxed::F.FnBox<A>::call_box::h17817677889962343674
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  17:     0x7f5aff554e91 - sys::thread::create::thread_start::h39e30398a7bd426faqv
  18:     0x7f5afeee3181 - start_thread
  19:     0x7f5afe7f247c - __clone
  20:                0x0 - <unknown>
Thread 0: Cloning Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff547240 - arcdebug::ArcDebug<T>.Clone::clone::h3326700919404439755
                        at src/arcdebug.rs:33
   3:     0x7f5aff541e3b - LockSpace<K, V>::lock::h11658868991106758464
                        at src/lib.rs:261
   4:     0x7f5aff5390c2 - LockSpace<K, V>::with_lock::h9080770623883117772
                        at src/lib.rs:242
   5:     0x7f5aff538f46 - test::closure.3366
                        at src/bin/auto_cleanup.rs:22
   6:     0x7f5aff538ea8 - boxed::F.FnBox<A>::call_box::h8054860876095691231
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
   7:     0x7f5aff538a87 - boxed::Box<FnBox<A, Output $u3d$$u20$R$GT$$u2b$$u20$Send$u20$$u2b$$u20$$u27$a$GT$.FnOnce$LT$A$GT$::call_once::h767267329913727791
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:390
   8:     0x7f5aff538011 - thread::Builder::spawn_inner::closure.3309
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:351
   9:     0x7f5aff537f7e - rt::unwind::try::try_fn::__rust_abi::h11159915160843785131
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:139
  10:     0x7f5aff537f19 - rt::unwind::try::try_fn::h11159915160843785131
  11:     0x7f5aff55acf8 - rust_try_inner
  12:     0x7f5aff55ace5 - rust_try
  13:     0x7f5aff5373ba - rt::unwind::try::h6327546562003534004
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:125
  14:     0x7f5aff536fe7 - thread::Builder::spawn_inner::closure.3185
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:349
  15:     0x7f5aff538c8d - boxed::F.FnBox<A>::call_box::h17817677889962343674
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  16:     0x7f5aff554e91 - sys::thread::create::thread_start::h39e30398a7bd426faqv
  17:     0x7f5afeee3181 - start_thread
  18:     0x7f5afe7f247c - __clone
  19:                0x0 - <unknown>
Thread 0: Cloning Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff547240 - arcdebug::ArcDebug<T>.Clone::clone::h3326700919404439755
                        at src/arcdebug.rs:33
   3:     0x7f5aff54761e - arcmutexguard::arc_mutex_lock::h18060832458674610577
                        at src/arcmutexguard.rs:46
   4:     0x7f5aff541e79 - LockSpace<K, V>::lock::h11658868991106758464
                        at src/lib.rs:261
   5:     0x7f5aff5390c2 - LockSpace<K, V>::with_lock::h9080770623883117772
                        at src/lib.rs:242
   6:     0x7f5aff538f46 - test::closure.3366
                        at src/bin/auto_cleanup.rs:22
   7:     0x7f5aff538ea8 - boxed::F.FnBox<A>::call_box::h8054860876095691231
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
   8:     0x7f5aff538a87 - boxed::Box<FnBox<A, Output $u3d$$u20$R$GT$$u2b$$u20$Send$u20$$u2b$$u20$$u27$a$GT$.FnOnce$LT$A$GT$::call_once::h767267329913727791
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:390
   9:     0x7f5aff538011 - thread::Builder::spawn_inner::closure.3309
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:351
  10:     0x7f5aff537f7e - rt::unwind::try::try_fn::__rust_abi::h11159915160843785131
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:139
  11:     0x7f5aff537f19 - rt::unwind::try::try_fn::h11159915160843785131
  12:     0x7f5aff55acf8 - rust_try_inner
  13:     0x7f5aff55ace5 - rust_try
  14:     0x7f5aff5373ba - rt::unwind::try::h6327546562003534004
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:125
  15:     0x7f5aff536fe7 - thread::Builder::spawn_inner::closure.3185
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:349
  16:     0x7f5aff538c8d - boxed::F.FnBox<A>::call_box::h17817677889962343674
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  17:     0x7f5aff554e91 - sys::thread::create::thread_start::h39e30398a7bd426faqv
  18:     0x7f5afeee3181 - start_thread
  19:     0x7f5afe7f247c - __clone
  20:                0x0 - <unknown>
Thread 0: Dropping Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff52e547 - arcdebug::ArcDebug<T>.Drop::drop::h9386332846483233423
                        at src/arcdebug.rs:26
   3:     0x7f5aff52e26a - namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>::drop.2477::h30445444648d8d29
   4:     0x7f5aff5477b6 - arcmutexguard::arc_mutex_lock::h18060832458674610577
                        at src/arcmutexguard.rs:45
   5:     0x7f5aff541e79 - LockSpace<K, V>::lock::h11658868991106758464
                        at src/lib.rs:261
   6:     0x7f5aff5390c2 - LockSpace<K, V>::with_lock::h9080770623883117772
                        at src/lib.rs:242
   7:     0x7f5aff538f46 - test::closure.3366
                        at src/bin/auto_cleanup.rs:22
   8:     0x7f5aff538ea8 - boxed::F.FnBox<A>::call_box::h8054860876095691231
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
   9:     0x7f5aff538a87 - boxed::Box<FnBox<A, Output $u3d$$u20$R$GT$$u2b$$u20$Send$u20$$u2b$$u20$$u27$a$GT$.FnOnce$LT$A$GT$::call_once::h767267329913727791
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:390
  10:     0x7f5aff538011 - thread::Builder::spawn_inner::closure.3309
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:351
  11:     0x7f5aff537f7e - rt::unwind::try::try_fn::__rust_abi::h11159915160843785131
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:139
  12:     0x7f5aff537f19 - rt::unwind::try::try_fn::h11159915160843785131
  13:     0x7f5aff55acf8 - rust_try_inner
  14:     0x7f5aff55ace5 - rust_try
  15:     0x7f5aff5373ba - rt::unwind::try::h6327546562003534004
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:125
  16:     0x7f5aff536fe7 - thread::Builder::spawn_inner::closure.3185
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:349
  17:     0x7f5aff538c8d - boxed::F.FnBox<A>::call_box::h17817677889962343674
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  18:     0x7f5aff554e91 - sys::thread::create::thread_start::h39e30398a7bd426faqv
  19:     0x7f5afeee3181 - start_thread
  20:     0x7f5afe7f247c - __clone
  21:                0x0 - <unknown>
Thread 0: Dropping bool at 0x7f5afd024038
Thread 0: Dropping LockSpaceGuard at 0x7f5afe3f05a0, mutex@0x7f5afd024030, inner@Some(0x7f5afe3f05c0)
Thread 0: Dropping ArcMutexGuard at 0x7f5afd024030, mutex@0x7f5afe3f05c0, inner@Some(0x7f5afd024038)
Thread 0: Dropping Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff52e547 - arcdebug::ArcDebug<T>.Drop::drop::h9386332846483233423
                        at src/arcdebug.rs:26
   3:     0x7f5aff52e26a - namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>::drop.2477::h30445444648d8d29
   4:     0x7f5aff53a181 - namedlock..arcmutexguard..ArcMutexGuard<WrappedBool>::drop.3470::hecb29ff6101c20de
   5:     0x7f5aff53a0fb - core..option..Option<namedlock..arcmutexguard..ArcMutexGuard<WrappedBool>>::drop.3467::h6fc8e09d28f00f26
   6:     0x7f5aff539911 - LockSpaceGuard<'a, K, V>.Drop::drop::h16077704487271028105
                        at src/lib.rs:163
   7:     0x7f5aff53950a - namedlock..LockSpaceGuard<collections..string..String, WrappedBool>::drop.3419::h5f5d6cd70b6508b0
   8:     0x7f5aff539431 - LockSpace<K, V>::with_lock::closure.3413
                        at src/lib.rs:242
   9:     0x7f5aff53929a - result::Result<T, E>::map::h13030106202929565598
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libcore/result.rs:475
  10:     0x7f5aff5390ce - LockSpace<K, V>::with_lock::h9080770623883117772
                        at src/lib.rs:242
  11:     0x7f5aff538f46 - test::closure.3366
                        at src/bin/auto_cleanup.rs:22
  12:     0x7f5aff538ea8 - boxed::F.FnBox<A>::call_box::h8054860876095691231
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  13:     0x7f5aff538a87 - boxed::Box<FnBox<A, Output $u3d$$u20$R$GT$$u2b$$u20$Send$u20$$u2b$$u20$$u27$a$GT$.FnOnce$LT$A$GT$::call_once::h767267329913727791
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:390
  14:     0x7f5aff538011 - thread::Builder::spawn_inner::closure.3309
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:351
  15:     0x7f5aff537f7e - rt::unwind::try::try_fn::__rust_abi::h11159915160843785131
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:139
  16:     0x7f5aff537f19 - rt::unwind::try::try_fn::h11159915160843785131
  17:     0x7f5aff55acf8 - rust_try_inner
  18:     0x7f5aff55ace5 - rust_try
  19:     0x7f5aff5373ba - rt::unwind::try::h6327546562003534004
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:125
  20:     0x7f5aff536fe7 - thread::Builder::spawn_inner::closure.3185
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:349
  21:     0x7f5aff538c8d - boxed::F.FnBox<A>::call_box::h17817677889962343674
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  22:     0x7f5aff554e91 - sys::thread::create::thread_start::h39e30398a7bd426faqv
  23:     0x7f5afeee3181 - start_thread
  24:     0x7f5afe7f247c - __clone
  25:                0x0 - <unknown>
Thread 1: lock: (k:"test",val refs:3),
Thread 1: Cloning Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff547240 - arcdebug::ArcDebug<T>.Clone::clone::h3326700919404439755
                        at src/arcdebug.rs:33
   3:     0x7f5aff546f39 - tuple::_(A, B).Clone::clone::h10369886360165513904
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libcore/tuple.rs:56
   4:     0x7f5aff541e2d - LockSpace<K, V>::lock::h11658868991106758464
                        at src/lib.rs:260
   5:     0x7f5aff5390c2 - LockSpace<K, V>::with_lock::h9080770623883117772
                        at src/lib.rs:242
   6:     0x7f5aff538f46 - test::closure.3366
                        at src/bin/auto_cleanup.rs:22
   7:     0x7f5aff538ea8 - boxed::F.FnBox<A>::call_box::h8054860876095691231
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
   8:     0x7f5aff538a87 - boxed::Box<FnBox<A, Output $u3d$$u20$R$GT$$u2b$$u20$Send$u20$$u2b$$u20$$u27$a$GT$.FnOnce$LT$A$GT$::call_once::h767267329913727791
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:390
   9:     0x7f5aff538011 - thread::Builder::spawn_inner::closure.3309
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:351
  10:     0x7f5aff537f7e - rt::unwind::try::try_fn::__rust_abi::h11159915160843785131
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:139
  11:     0x7f5aff537f19 - rt::unwind::try::try_fn::h11159915160843785131
  12:     0x7f5aff55acf8 - rust_try_inner
  13:     0x7f5aff55ace5 - rust_try
  14:     0x7f5aff5373ba - rt::unwind::try::h6327546562003534004
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:125
  15:     0x7f5aff536fe7 - thread::Builder::spawn_inner::closure.3185
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:349
  16:     0x7f5aff538c8d - boxed::F.FnBox<A>::call_box::h17817677889962343674
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  17:     0x7f5aff554e91 - sys::thread::create::thread_start::h39e30398a7bd426faqv
  18:     0x7f5afeee3181 - start_thread
  19:     0x7f5afe7f247c - __clone
  20:                0x0 - <unknown>
Thread 1: Cloning Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff547240 - arcdebug::ArcDebug<T>.Clone::clone::h3326700919404439755
                        at src/arcdebug.rs:33
   3:     0x7f5aff541e3b - LockSpace<K, V>::lock::h11658868991106758464
                        at src/lib.rs:261
   4:     0x7f5aff5390c2 - LockSpace<K, V>::with_lock::h9080770623883117772
                        at src/lib.rs:242
   5:     0x7f5aff538f46 - test::closure.3366
                        at src/bin/auto_cleanup.rs:22
   6:     0x7f5aff538ea8 - boxed::F.FnBox<A>::call_box::h8054860876095691231
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
   7:     0x7f5aff538a87 - boxed::Box<FnBox<A, Output $u3d$$u20$R$GT$$u2b$$u20$Send$u20$$u2b$$u20$$u27$a$GT$.FnOnce$LT$A$GT$::call_once::h767267329913727791
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:390
   8:     0x7f5aff538011 - thread::Builder::spawn_inner::closure.3309
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:351
   9:     0x7f5aff537f7e - rt::unwind::try::try_fn::__rust_abi::h11159915160843785131
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:139
  10:     0x7f5aff537f19 - rt::unwind::try::try_fn::h11159915160843785131
  11:     0x7f5aff55acf8 - rust_try_inner
  12:     0x7f5aff55ace5 - rust_try
  13:     0x7f5aff5373ba - rt::unwind::try::h6327546562003534004
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:125
  14:     0x7f5aff536fe7 - thread::Builder::spawn_inner::closure.3185
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:349
  15:     0x7f5aff538c8d - boxed::F.FnBox<A>::call_box::h17817677889962343674
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  16:     0x7f5aff554e91 - sys::thread::create::thread_start::h39e30398a7bd426faqv
  17:     0x7f5afeee3181 - start_thread
  18:     0x7f5afe7f247c - __clone
  19:                0x0 - <unknown>
Thread 1: Cloning Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff547240 - arcdebug::ArcDebug<T>.Clone::clone::h3326700919404439755
                        at src/arcdebug.rs:33
   3:     0x7f5aff54761e - arcmutexguard::arc_mutex_lock::h18060832458674610577
                        at src/arcmutexguard.rs:46
   4:     0x7f5aff541e79 - LockSpace<K, V>::lock::h11658868991106758464
                        at src/lib.rs:261
   5:     0x7f5aff5390c2 - LockSpace<K, V>::with_lock::h9080770623883117772
                        at src/lib.rs:242
   6:     0x7f5aff538f46 - test::closure.3366
                        at src/bin/auto_cleanup.rs:22
   7:     0x7f5aff538ea8 - boxed::F.FnBox<A>::call_box::h8054860876095691231
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
   8:     0x7f5aff538a87 - boxed::Box<FnBox<A, Output $u3d$$u20$R$GT$$u2b$$u20$Send$u20$$u2b$$u20$$u27$a$GT$.FnOnce$LT$A$GT$::call_once::h767267329913727791
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:390
   9:     0x7f5aff538011 - thread::Builder::spawn_inner::closure.3309
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:351
  10:     0x7f5aff537f7e - rt::unwind::try::try_fn::__rust_abi::h11159915160843785131
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:139
  11:     0x7f5aff537f19 - rt::unwind::try::try_fn::h11159915160843785131
  12:     0x7f5aff55acf8 - rust_try_inner
  13:     0x7f5aff55ace5 - rust_try
  14:     0x7f5aff5373ba - rt::unwind::try::h6327546562003534004
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:125
  15:     0x7f5aff536fe7 - thread::Builder::spawn_inner::closure.3185
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:349
  16:     0x7f5aff538c8d - boxed::F.FnBox<A>::call_box::h17817677889962343674
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  17:     0x7f5aff554e91 - sys::thread::create::thread_start::h39e30398a7bd426faqv
  18:     0x7f5afeee3181 - start_thread
  19:     0x7f5afe7f247c - __clone
  20:                0x0 - <unknown>
Thread 1: Dropping Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff52e547 - arcdebug::ArcDebug<T>.Drop::drop::h9386332846483233423
                        at src/arcdebug.rs:26
   3:     0x7f5aff52e26a - namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>::drop.2477::h30445444648d8d29
   4:     0x7f5aff5477b6 - arcmutexguard::arc_mutex_lock::h18060832458674610577
                        at src/arcmutexguard.rs:45
   5:     0x7f5aff541e79 - LockSpace<K, V>::lock::h11658868991106758464
                        at src/lib.rs:261
   6:     0x7f5aff5390c2 - LockSpace<K, V>::with_lock::h9080770623883117772
                        at src/lib.rs:242
   7:     0x7f5aff538f46 - test::closure.3366
                        at src/bin/auto_cleanup.rs:22
   8:     0x7f5aff538ea8 - boxed::F.FnBox<A>::call_box::h8054860876095691231
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
   9:     0x7f5aff538a87 - boxed::Box<FnBox<A, Output $u3d$$u20$R$GT$$u2b$$u20$Send$u20$$u2b$$u20$$u27$a$GT$.FnOnce$LT$A$GT$::call_once::h767267329913727791
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:390
  10:     0x7f5aff538011 - thread::Builder::spawn_inner::closure.3309
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:351
  11:     0x7f5aff537f7e - rt::unwind::try::try_fn::__rust_abi::h11159915160843785131
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:139
  12:     0x7f5aff537f19 - rt::unwind::try::try_fn::h11159915160843785131
  13:     0x7f5aff55acf8 - rust_try_inner
  14:     0x7f5aff55ace5 - rust_try
  15:     0x7f5aff5373ba - rt::unwind::try::h6327546562003534004
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:125
  16:     0x7f5aff536fe7 - thread::Builder::spawn_inner::closure.3185
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:349
  17:     0x7f5aff538c8d - boxed::F.FnBox<A>::call_box::h17817677889962343674
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  18:     0x7f5aff554e91 - sys::thread::create::thread_start::h39e30398a7bd426faqv
  19:     0x7f5afeee3181 - start_thread
  20:     0x7f5afe7f247c - __clone
  21:                0x0 - <unknown>
Thread 1: Dropping bool at 0x7f5afd024038
Thread 1: Dropping LockSpaceGuard at 0x7f5afd7fe5a0, mutex@0x7f5afd024030, inner@Some(0x7f5afd7fe5c0)
Thread 1: Dropping ArcMutexGuard at 0x7f5afd024030, mutex@0x7f5afd7fe5c0, inner@Some(0x7f5afd024038)
Thread 1: Dropping Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff52e547 - arcdebug::ArcDebug<T>.Drop::drop::h9386332846483233423
                        at src/arcdebug.rs:26
   3:     0x7f5aff52e26a - namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>::drop.2477::h30445444648d8d29
   4:     0x7f5aff53a181 - namedlock..arcmutexguard..ArcMutexGuard<WrappedBool>::drop.3470::hecb29ff6101c20de
   5:     0x7f5aff53a0fb - core..option..Option<namedlock..arcmutexguard..ArcMutexGuard<WrappedBool>>::drop.3467::h6fc8e09d28f00f26
   6:     0x7f5aff539911 - LockSpaceGuard<'a, K, V>.Drop::drop::h16077704487271028105
                        at src/lib.rs:163
   7:     0x7f5aff53950a - namedlock..LockSpaceGuard<collections..string..String, WrappedBool>::drop.3419::h5f5d6cd70b6508b0
   8:     0x7f5aff539431 - LockSpace<K, V>::with_lock::closure.3413
                        at src/lib.rs:242
   9:     0x7f5aff53929a - result::Result<T, E>::map::h13030106202929565598
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libcore/result.rs:475
  10:     0x7f5aff5390ce - LockSpace<K, V>::with_lock::h9080770623883117772
                        at src/lib.rs:242
  11:     0x7f5aff538f46 - test::closure.3366
                        at src/bin/auto_cleanup.rs:22
  12:     0x7f5aff538ea8 - boxed::F.FnBox<A>::call_box::h8054860876095691231
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  13:     0x7f5aff538a87 - boxed::Box<FnBox<A, Output $u3d$$u20$R$GT$$u2b$$u20$Send$u20$$u2b$$u20$$u27$a$GT$.FnOnce$LT$A$GT$::call_once::h767267329913727791
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:390
  14:     0x7f5aff538011 - thread::Builder::spawn_inner::closure.3309
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:351
  15:     0x7f5aff537f7e - rt::unwind::try::try_fn::__rust_abi::h11159915160843785131
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:139
  16:     0x7f5aff537f19 - rt::unwind::try::try_fn::h11159915160843785131
  17:     0x7f5aff55acf8 - rust_try_inner
  18:     0x7f5aff55ace5 - rust_try
  19:     0x7f5aff5373ba - rt::unwind::try::h6327546562003534004
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:125
  20:     0x7f5aff536fe7 - thread::Builder::spawn_inner::closure.3185
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:349
  21:     0x7f5aff538c8d - boxed::F.FnBox<A>::call_box::h17817677889962343674
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  22:     0x7f5aff554e91 - sys::thread::create::thread_start::h39e30398a7bd426faqv
  23:     0x7f5afeee3181 - start_thread
  24:     0x7f5afe7f247c - __clone
  25:                0x0 - <unknown>
Thread 0: try_remove_internal: (k:"test",val refs:4),
Thread 0: Dropping Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff52e547 - arcdebug::ArcDebug<T>.Drop::drop::h9386332846483233423
                        at src/arcdebug.rs:26
   3:     0x7f5aff52e26a - namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>::drop.2477::h30445444648d8d29
   4:     0x7f5aff52e1f5 - _(namedlock..archashkey..ArcHashKey<collections..string..String>, namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>)::drop.2474::hbddd81ac2c10f0da
   5:     0x7f5aff539515 - namedlock..LockSpaceGuard<collections..string..String, WrappedBool>::drop.3419::h5f5d6cd70b6508b0
   6:     0x7f5aff539431 - LockSpace<K, V>::with_lock::closure.3413
                        at src/lib.rs:242
   7:     0x7f5aff53929a - result::Result<T, E>::map::h13030106202929565598
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libcore/result.rs:475
   8:     0x7f5aff5390ce - LockSpace<K, V>::with_lock::h9080770623883117772
                        at src/lib.rs:242
   9:     0x7f5aff538f46 - test::closure.3366
                        at src/bin/auto_cleanup.rs:22
  10:     0x7f5aff538ea8 - boxed::F.FnBox<A>::call_box::h8054860876095691231
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  11:     0x7f5aff538a87 - boxed::Box<FnBox<A, Output $u3d$$u20$R$GT$$u2b$$u20$Send$u20$$u2b$$u20$$u27$a$GT$.FnOnce$LT$A$GT$::call_once::h767267329913727791
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:390
  12:     0x7f5aff538011 - thread::Builder::spawn_inner::closure.3309
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:351
  13:     0x7f5aff537f7e - rt::unwind::try::try_fn::__rust_abi::h11159915160843785131
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:139
  14:     0x7f5aff537f19 - rt::unwind::try::try_fn::h11159915160843785131
  15:     0x7f5aff55acf8 - rust_try_inner
  16:     0x7f5aff55ace5 - rust_try
  17:     0x7f5aff5373ba - rt::unwind::try::h6327546562003534004
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:125
  18:     0x7f5aff536fe7 - thread::Builder::spawn_inner::closure.3185
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:349
  19:     0x7f5aff538c8d - boxed::F.FnBox<A>::call_box::h17817677889962343674
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  20:     0x7f5aff554e91 - sys::thread::create::thread_start::h39e30398a7bd426faqv
  21:     0x7f5afeee3181 - start_thread
  22:     0x7f5afe7f247c - __clone
  23:                0x0 - <unknown>
Thread 1: try_remove_internal: (k:"test",val refs:3),
Thread 1: Dropping Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff52e547 - arcdebug::ArcDebug<T>.Drop::drop::h9386332846483233423
                        at src/arcdebug.rs:26
   3:     0x7f5aff52e26a - namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>::drop.2477::h30445444648d8d29
   4:     0x7f5aff52e1f5 - _(namedlock..archashkey..ArcHashKey<collections..string..String>, namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>)::drop.2474::hbddd81ac2c10f0da
   5:     0x7f5aff539515 - namedlock..LockSpaceGuard<collections..string..String, WrappedBool>::drop.3419::h5f5d6cd70b6508b0
   6:     0x7f5aff539431 - LockSpace<K, V>::with_lock::closure.3413
                        at src/lib.rs:242
   7:     0x7f5aff53929a - result::Result<T, E>::map::h13030106202929565598
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libcore/result.rs:475
   8:     0x7f5aff5390ce - LockSpace<K, V>::with_lock::h9080770623883117772
                        at src/lib.rs:242
   9:     0x7f5aff538f46 - test::closure.3366
                        at src/bin/auto_cleanup.rs:22
  10:     0x7f5aff538ea8 - boxed::F.FnBox<A>::call_box::h8054860876095691231
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  11:     0x7f5aff538a87 - boxed::Box<FnBox<A, Output $u3d$$u20$R$GT$$u2b$$u20$Send$u20$$u2b$$u20$$u27$a$GT$.FnOnce$LT$A$GT$::call_once::h767267329913727791
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:390
  12:     0x7f5aff538011 - thread::Builder::spawn_inner::closure.3309
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:351
  13:     0x7f5aff537f7e - rt::unwind::try::try_fn::__rust_abi::h11159915160843785131
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:139
  14:     0x7f5aff537f19 - rt::unwind::try::try_fn::h11159915160843785131
  15:     0x7f5aff55acf8 - rust_try_inner
  16:     0x7f5aff55ace5 - rust_try
  17:     0x7f5aff5373ba - rt::unwind::try::h6327546562003534004
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/rt/unwind.rs:125
  18:     0x7f5aff536fe7 - thread::Builder::spawn_inner::closure.3185
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libstd/thread/mod.rs:349
  19:     0x7f5aff538c8d - boxed::F.FnBox<A>::call_box::h17817677889962343674
                        at /build/buildd/rust-stable-1.0.0~trusty/src/liballoc/boxed.rs:374
  20:     0x7f5aff554e91 - sys::thread::create::thread_start::h39e30398a7bd426faqv
  21:     0x7f5afeee3181 - start_thread
  22:     0x7f5afe7f247c - __clone
  23:                0x0 - <unknown>
Thread <main>: lock: (k:"test",val refs:1),
Thread <main>: Cloning Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff547240 - arcdebug::ArcDebug<T>.Clone::clone::h3326700919404439755
                        at src/arcdebug.rs:33
   3:     0x7f5aff546f39 - tuple::_(A, B).Clone::clone::h10369886360165513904
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libcore/tuple.rs:56
   4:     0x7f5aff549b95 - LockSpace<K, V>::lock::h8520964079414655195
                        at src/lib.rs:260
   5:     0x7f5aff5491db - LockSpace<K, V>::with_lock::h6823956640643866368
                        at src/lib.rs:242
   6:     0x7f5aff52c468 - test::hb3fe428b9c2ee1abiba
                        at src/bin/auto_cleanup.rs:35
   7:     0x7f5aff54a80d - main::h75ef713acfe436e84ea
                        at src/bin/auto_cleanup.rs:41
   8:     0x7f5aff55acf8 - rust_try_inner
   9:     0x7f5aff55ace5 - rust_try
  10:     0x7f5aff55791b - rt::lang_start::h9e9681a903e7387aOlw
  11:     0x7f5aff54a984 - main
  12:     0x7f5afe719ec4 - __libc_start_main
  13:     0x7f5aff529f18 - <unknown>
  14:                0x0 - <unknown>
Thread <main>: Cloning Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff547240 - arcdebug::ArcDebug<T>.Clone::clone::h3326700919404439755
                        at src/arcdebug.rs:33
   3:     0x7f5aff549ba3 - LockSpace<K, V>::lock::h8520964079414655195
                        at src/lib.rs:261
   4:     0x7f5aff5491db - LockSpace<K, V>::with_lock::h6823956640643866368
                        at src/lib.rs:242
   5:     0x7f5aff52c468 - test::hb3fe428b9c2ee1abiba
                        at src/bin/auto_cleanup.rs:35
   6:     0x7f5aff54a80d - main::h75ef713acfe436e84ea
                        at src/bin/auto_cleanup.rs:41
   7:     0x7f5aff55acf8 - rust_try_inner
   8:     0x7f5aff55ace5 - rust_try
   9:     0x7f5aff55791b - rt::lang_start::h9e9681a903e7387aOlw
  10:     0x7f5aff54a984 - main
  11:     0x7f5afe719ec4 - __libc_start_main
  12:     0x7f5aff529f18 - <unknown>
  13:                0x0 - <unknown>
Thread <main>: Cloning Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff547240 - arcdebug::ArcDebug<T>.Clone::clone::h3326700919404439755
                        at src/arcdebug.rs:33
   3:     0x7f5aff54761e - arcmutexguard::arc_mutex_lock::h18060832458674610577
                        at src/arcmutexguard.rs:46
   4:     0x7f5aff549be1 - LockSpace<K, V>::lock::h8520964079414655195
                        at src/lib.rs:261
   5:     0x7f5aff5491db - LockSpace<K, V>::with_lock::h6823956640643866368
                        at src/lib.rs:242
   6:     0x7f5aff52c468 - test::hb3fe428b9c2ee1abiba
                        at src/bin/auto_cleanup.rs:35
   7:     0x7f5aff54a80d - main::h75ef713acfe436e84ea
                        at src/bin/auto_cleanup.rs:41
   8:     0x7f5aff55acf8 - rust_try_inner
   9:     0x7f5aff55ace5 - rust_try
  10:     0x7f5aff55791b - rt::lang_start::h9e9681a903e7387aOlw
  11:     0x7f5aff54a984 - main
  12:     0x7f5afe719ec4 - __libc_start_main
  13:     0x7f5aff529f18 - <unknown>
  14:                0x0 - <unknown>
Thread <main>: Dropping Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff52e547 - arcdebug::ArcDebug<T>.Drop::drop::h9386332846483233423
                        at src/arcdebug.rs:26
   3:     0x7f5aff52e26a - namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>::drop.2477::h30445444648d8d29
   4:     0x7f5aff5477b6 - arcmutexguard::arc_mutex_lock::h18060832458674610577
                        at src/arcmutexguard.rs:45
   5:     0x7f5aff549be1 - LockSpace<K, V>::lock::h8520964079414655195
                        at src/lib.rs:261
   6:     0x7f5aff5491db - LockSpace<K, V>::with_lock::h6823956640643866368
                        at src/lib.rs:242
   7:     0x7f5aff52c468 - test::hb3fe428b9c2ee1abiba
                        at src/bin/auto_cleanup.rs:35
   8:     0x7f5aff54a80d - main::h75ef713acfe436e84ea
                        at src/bin/auto_cleanup.rs:41
   9:     0x7f5aff55acf8 - rust_try_inner
  10:     0x7f5aff55ace5 - rust_try
  11:     0x7f5aff55791b - rt::lang_start::h9e9681a903e7387aOlw
  12:     0x7f5aff54a984 - main
  13:     0x7f5afe719ec4 - __libc_start_main
  14:     0x7f5aff529f18 - <unknown>
  15:                0x0 - <unknown>
Thread <main>: Dropping LockSpaceGuard at 0x7ffd1969a680, mutex@0x7f5afd024030, inner@Some(0x7ffd1969a6a0)
Thread <main>: Dropping ArcMutexGuard at 0x7f5afd024030, mutex@0x7ffd1969a6a0, inner@Some(0x7f5afd024038)
Thread <main>: Dropping Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff52e547 - arcdebug::ArcDebug<T>.Drop::drop::h9386332846483233423
                        at src/arcdebug.rs:26
   3:     0x7f5aff52e26a - namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>::drop.2477::h30445444648d8d29
   4:     0x7f5aff53a181 - namedlock..arcmutexguard..ArcMutexGuard<WrappedBool>::drop.3470::hecb29ff6101c20de
   5:     0x7f5aff53a0fb - core..option..Option<namedlock..arcmutexguard..ArcMutexGuard<WrappedBool>>::drop.3467::h6fc8e09d28f00f26
   6:     0x7f5aff539911 - LockSpaceGuard<'a, K, V>.Drop::drop::h16077704487271028105
                        at src/lib.rs:163
   7:     0x7f5aff53950a - namedlock..LockSpaceGuard<collections..string..String, WrappedBool>::drop.3419::h5f5d6cd70b6508b0
   8:     0x7f5aff549551 - LockSpace<K, V>::with_lock::closure.4171
                        at src/lib.rs:242
   9:     0x7f5aff5493ba - result::Result<T, E>::map::h1500586203231499821
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libcore/result.rs:475
  10:     0x7f5aff5491e7 - LockSpace<K, V>::with_lock::h6823956640643866368
                        at src/lib.rs:242
  11:     0x7f5aff52c468 - test::hb3fe428b9c2ee1abiba
                        at src/bin/auto_cleanup.rs:35
  12:     0x7f5aff54a80d - main::h75ef713acfe436e84ea
                        at src/bin/auto_cleanup.rs:41
  13:     0x7f5aff55acf8 - rust_try_inner
  14:     0x7f5aff55ace5 - rust_try
  15:     0x7f5aff55791b - rt::lang_start::h9e9681a903e7387aOlw
  16:     0x7f5aff54a984 - main
  17:     0x7f5afe719ec4 - __libc_start_main
  18:     0x7f5aff529f18 - <unknown>
  19:                0x0 - <unknown>
Thread <main>: try_remove_internal: (k:"test",val refs:2),
Thread <main>: Dropping Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff52e547 - arcdebug::ArcDebug<T>.Drop::drop::h9386332846483233423
                        at src/arcdebug.rs:26
   3:     0x7f5aff52e26a - namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>::drop.2477::h30445444648d8d29
   4:     0x7f5aff52e1f5 - _(namedlock..archashkey..ArcHashKey<collections..string..String>, namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>)::drop.2474::hbddd81ac2c10f0da
   5:     0x7f5aff54174b - core..option..Option<(namedlock..archashkey..ArcHashKey<collections..string..String>, namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>)>::drop.3920::h3cb0045e9295771b
   6:     0x7f5aff53ba00 - LockSpace<K, V>::try_remove_internal::h448770990214518149
                        at src/lib.rs:283
   7:     0x7f5aff5399b5 - LockSpaceGuard<'a, K, V>.Drop::drop::h16077704487271028105
                        at src/lib.rs:165
   8:     0x7f5aff53950a - namedlock..LockSpaceGuard<collections..string..String, WrappedBool>::drop.3419::h5f5d6cd70b6508b0
   9:     0x7f5aff549551 - LockSpace<K, V>::with_lock::closure.4171
                        at src/lib.rs:242
  10:     0x7f5aff5493ba - result::Result<T, E>::map::h1500586203231499821
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libcore/result.rs:475
  11:     0x7f5aff5491e7 - LockSpace<K, V>::with_lock::h6823956640643866368
                        at src/lib.rs:242
  12:     0x7f5aff52c468 - test::hb3fe428b9c2ee1abiba
                        at src/bin/auto_cleanup.rs:35
  13:     0x7f5aff54a80d - main::h75ef713acfe436e84ea
                        at src/bin/auto_cleanup.rs:41
  14:     0x7f5aff55acf8 - rust_try_inner
  15:     0x7f5aff55ace5 - rust_try
  16:     0x7f5aff55791b - rt::lang_start::h9e9681a903e7387aOlw
  17:     0x7f5aff54a984 - main
  18:     0x7f5afe719ec4 - __libc_start_main
  19:     0x7f5aff529f18 - <unknown>
  20:                0x0 - <unknown>
Thread <main>: Dropping Arc with inner 0x7f5afd024030
stack backtrace:
   1:     0x7f5aff552a39 - sys::backtrace::write::h869d65c21ae28e97d4r
   2:     0x7f5aff52e547 - arcdebug::ArcDebug<T>.Drop::drop::h9386332846483233423
                        at src/arcdebug.rs:26
   3:     0x7f5aff52e26a - namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>::drop.2477::h30445444648d8d29
   4:     0x7f5aff52e1f5 - _(namedlock..archashkey..ArcHashKey<collections..string..String>, namedlock..arcdebug..ArcDebug<std..sync..mutex..Mutex<WrappedBool>>)::drop.2474::hbddd81ac2c10f0da
   5:     0x7f5aff539515 - namedlock..LockSpaceGuard<collections..string..String, WrappedBool>::drop.3419::h5f5d6cd70b6508b0
   6:     0x7f5aff549551 - LockSpace<K, V>::with_lock::closure.4171
                        at src/lib.rs:242
   7:     0x7f5aff5493ba - result::Result<T, E>::map::h1500586203231499821
                        at /build/buildd/rust-stable-1.0.0~trusty/src/libcore/result.rs:475
   8:     0x7f5aff5491e7 - LockSpace<K, V>::with_lock::h6823956640643866368
                        at src/lib.rs:242
   9:     0x7f5aff52c468 - test::hb3fe428b9c2ee1abiba
                        at src/bin/auto_cleanup.rs:35
  10:     0x7f5aff54a80d - main::h75ef713acfe436e84ea
                        at src/bin/auto_cleanup.rs:41
  11:     0x7f5aff55acf8 - rust_try_inner
  12:     0x7f5aff55ace5 - rust_try
  13:     0x7f5aff55791b - rt::lang_start::h9e9681a903e7387aOlw
  14:     0x7f5aff54a984 - main
  15:     0x7f5afe719ec4 - __libc_start_main
  16:     0x7f5aff529f18 - <unknown>
  17:                0x0 - <unknown>
Thread <main>: Dropping bool at 0x7ffd1969a468
thread '<main>' panicked at 'Failed at iter 0, LockSpace{auto_clean,}', src/bin/auto_cleanup.rs:36
