[INFO] crate blackhole 0.16.0 is already in cache
[INFO] extracting crate blackhole 0.16.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/blackhole/0.16.0
[INFO] extracting crate blackhole 0.16.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/blackhole/0.16.0
[INFO] validating manifest of blackhole-0.16.0 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of blackhole-0.16.0 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing blackhole-0.16.0
[INFO] finished frobbing blackhole-0.16.0
[INFO] frobbed toml for blackhole-0.16.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/blackhole/0.16.0/Cargo.toml
[INFO] started frobbing blackhole-0.16.0
[INFO] finished frobbing blackhole-0.16.0
[INFO] frobbed toml for blackhole-0.16.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/blackhole/0.16.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing blackhole-0.16.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/blackhole/0.16.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 4cf8b8fc084aa7b2c14adbe6db0ee876e17756dc559c7a2801368e19ead53b8c
[INFO] running `"docker" "start" "-a" "4cf8b8fc084aa7b2c14adbe6db0ee876e17756dc559c7a2801368e19ead53b8c"`
[INFO] [stderr]    Compiling blackhole v0.16.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/job.rs:16:37
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn run(&mut self) -> Option<Box<Job>>;
[INFO] [stderr]    |                                     ^^^ help: use `dyn`: `dyn Job`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/job.rs:71:37
[INFO] [stderr]    |
[INFO] [stderr] 71 |     fn run(&mut self) -> Option<Box<Job>> {
[INFO] [stderr]    |                                     ^^^ help: use `dyn`: `dyn Job`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `"docker" "inspect" "4cf8b8fc084aa7b2c14adbe6db0ee876e17756dc559c7a2801368e19ead53b8c"`
[INFO] running `"docker" "rm" "-f" "4cf8b8fc084aa7b2c14adbe6db0ee876e17756dc559c7a2801368e19ead53b8c"`
[INFO] [stdout] 4cf8b8fc084aa7b2c14adbe6db0ee876e17756dc559c7a2801368e19ead53b8c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/blackhole/0.16.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] f4b2ae33f202a6d7729dcd8f749962fc0fb129eb2669c3030b7ce30a44b772aa
[INFO] running `"docker" "start" "-a" "f4b2ae33f202a6d7729dcd8f749962fc0fb129eb2669c3030b7ce30a44b772aa"`
[INFO] [stderr]    Compiling blackhole v0.16.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> tests/root.rs:25:37
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn run(&mut self) -> Option<Box<Job>> {
[INFO] [stderr]    |                                     ^^^ help: use `dyn`: `dyn Job`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/job.rs:16:37
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn run(&mut self) -> Option<Box<Job>>;
[INFO] [stderr]    |                                     ^^^ help: use `dyn`: `dyn Job`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/job.rs:71:37
[INFO] [stderr]    |
[INFO] [stderr] 71 |     fn run(&mut self) -> Option<Box<Job>> {
[INFO] [stderr]    |                                     ^^^ help: use `dyn`: `dyn Job`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.05s
[INFO] running `"docker" "inspect" "f4b2ae33f202a6d7729dcd8f749962fc0fb129eb2669c3030b7ce30a44b772aa"`
[INFO] running `"docker" "rm" "-f" "f4b2ae33f202a6d7729dcd8f749962fc0fb129eb2669c3030b7ce30a44b772aa"`
[INFO] [stdout] f4b2ae33f202a6d7729dcd8f749962fc0fb129eb2669c3030b7ce30a44b772aa
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/blackhole/0.16.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 40c28e6a3198f83d2f53bdfcd64fd0fc80a5b0f68ea64cd919bb74c92c398602
[INFO] running `"docker" "start" "-a" "40c28e6a3198f83d2f53bdfcd64fd0fc80a5b0f68ea64cd919bb74c92c398602"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/blackhole-49d3f9ae8af90b1c
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test active_limit::test_active_limit ... ok
[INFO] [stdout] test test_crate_version ... ok
[INFO] [stdout] test job::test_one_time ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/root-a58b6dd19a6de614
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test stressing_blackhole ... ignored
[INFO] [stdout] test test_get_online_processors ... ok
[INFO] [stderr] thread '<unnamed>' panicked at 'Test panicking...', tests/root.rs:27:13
[INFO] [stderr] stack backtrace:
[INFO] [stdout] 0 + 1 = 1
[INFO] [stdout] 1 + 3 = 4
[INFO] [stdout] #2 -> 6
[INFO] [stdout] 6 + 11 = 17
[INFO] [stderr]    0:     0x5595e6a3ec5b - backtrace::backtrace::libunwind::trace::h23ae608c8b906c69
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x5595e6a3ec5b - backtrace::backtrace::trace_unsynchronized::h65b3ea295a85fd48
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x5595e6a3ec5b - std::sys_common::backtrace::_print::h24f527b44b6cfc06
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x5595e6a3ec5b - std::sys_common::backtrace::print::h712608e4347fd64a
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x5595e6a3ec5b - std::panicking::default_hook::{{closure}}::h6c3d570c2b500048
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    5:     0x5595e6a3e936 - std::panicking::default_hook::hb29963fb4747e0dd
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]    6:     0x5595e6a3f3cd - std::panicking::rust_panic_with_hook::hd1236c3083de823a
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]    7:     0x5595e6999e11 - std::panicking::begin_panic::h881c41e1e966a698
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/panicking.rs:411
[INFO] [stderr]    8:     0x5595e69d280a - <root::Task as blackhole::job::Job>::run::h8db4de9c9ee900d7
[INFO] [stderr]                                at tests/root.rs:27
[INFO] [stderr]    9:     0x5595e69a5ddd - blackhole::job::run_to_end::h133355f52cd22075
[INFO] [stderr]                                at /opt/crater/workdir/src/job.rs:22
[INFO] [stderr]   10:     0x5595e69b5e98 - blackhole::root::spawn_job_runner::{{closure}}::h3c20782c77a320c9
[INFO] [stderr]                                at /opt/crater/workdir/src/root.rs:257
[INFO] [stderr]   11:     0x5595e69a102e - std::sys_common::backtrace::__rust_begin_short_backtrace::hc7a611fdd83c5c35
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/sys_common/backtrace.rs:77
[INFO] [stderr]   12:     0x5595e69d7791 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h8c1ff06fcf9231b6
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/thread/mod.rs:470
[INFO] [stderr]   13:     0x5595e69d4951 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h17fa663272cd2ef5
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/panic.rs:315
[INFO] [stderr]   14:     0x5595e699a671 - std::panicking::try::do_call::he2375625e7a41f8d
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/panicking.rs:296
[INFO] [stderr]   15:     0x5595e6a41d3a - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:80
[INFO] [stderr]   16:     0x5595e699a463 - std::panicking::try::hf921b5df6758f015
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/panicking.rs:275
[INFO] [stderr]   17:     0x5595e69d4c71 - std::panic::catch_unwind::hcfe333fbc6bbd08b
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/panic.rs:394
[INFO] [stderr]   18:     0x5595e69d71d2 - std::thread::Builder::spawn_unchecked::{{closure}}::h75366112998b42c5
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/thread/mod.rs:469
[INFO] [stderr]   19:     0x5595e69db403 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h76ae4536eb47ff72
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libcore/ops/function.rs:235
[INFO] [stderr]   20:     0x5595e6a3492f - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::hb5396a93648ae250
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/liballoc/boxed.rs:787
[INFO] [stderr]   21:     0x5595e6a413e0 - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h92593001847bb63e
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/liballoc/boxed.rs:787
[INFO] [stderr]   22:     0x5595e6a413e0 - std::sys_common::thread::start_thread::h569f3ccc0d5dcd83
[INFO] [stderr]                                at src/libstd/sys_common/thread.rs:13
[INFO] [stderr]   23:     0x5595e6a413e0 - std::sys::unix::thread::Thread::new::thread_start::hd9ff46fad032d886
[INFO] [stderr]                                at src/libstd/sys/unix/thread.rs:79
[INFO] [stderr]   24:     0x7f0aaa26c4a4 - start_thread
[INFO] [stderr]   25:     0x7f0aa9d97d0f - __clone
[INFO] [stderr]   26:                0x0 - <unknown>
[INFO] [stdout] #2 -> 27
[INFO] [stdout] #10 -> 27
[INFO] [stdout] 27 + 9 = 36
[INFO] [stdout] #4 -> 44
[INFO] [stdout] #8 -> 44
[INFO] [stdout] 44 + 7 = 51
[INFO] [stdout] #12 -> 57
[INFO] [stdout] #6 -> 57
[INFO] [stdout] 57 + 5 = 62
[INFO] [stdout] #10 -> 66
[INFO] [stdout] #4 -> 66
[INFO] [stdout] #8 -> 66
[INFO] [stdout] #6 -> 66
[INFO] [stdout] test tests ... ok
[INFO] [stderr]    Doc-tests blackhole
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - get_online_processors (line 153) ... ok
[INFO] [stdout] test src/lib.rs -  (line 35) ... ok
[INFO] [stdout] test src/job.rs - job::OneTime (line 36) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "40c28e6a3198f83d2f53bdfcd64fd0fc80a5b0f68ea64cd919bb74c92c398602"`
[INFO] running `"docker" "rm" "-f" "40c28e6a3198f83d2f53bdfcd64fd0fc80a5b0f68ea64cd919bb74c92c398602"`
[INFO] [stdout] 40c28e6a3198f83d2f53bdfcd64fd0fc80a5b0f68ea64cd919bb74c92c398602