[INFO] crate mcs 0.1.1 is already in cache
[INFO] extracting crate mcs 0.1.1 into work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/mcs/0.1.1
[INFO] extracting crate mcs 0.1.1 into work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/mcs/0.1.1
[INFO] validating manifest of mcs-0.1.1 on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mcs-0.1.1 on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mcs-0.1.1
[INFO] finished frobbing mcs-0.1.1
[INFO] frobbed toml for mcs-0.1.1 written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/mcs/0.1.1/Cargo.toml
[INFO] started frobbing mcs-0.1.1
[INFO] finished frobbing mcs-0.1.1
[INFO] frobbed toml for mcs-0.1.1 written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/mcs/0.1.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mcs-0.1.1 against try#7fea0229842e79db1159ea58ad9a653b288efee9 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-0/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/mcs/0.1.1:/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=forbid" "-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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "build" "--frozen"`
[INFO] [stdout] 9c8c22528a38363f1f195245f197763b7cd5d6d3e34f92f3cd9c8deb89f6727d
[INFO] running `"docker" "start" "-a" "9c8c22528a38363f1f195245f197763b7cd5d6d3e34f92f3cd9c8deb89f6727d"`
[INFO] [stderr]    Compiling mcs v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]    --> src/mutex.rs:117:9
[INFO] [stderr]     |
[INFO] [stderr] 117 |         unsafe {
[INFO] [stderr]     |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_unsafe)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `generic_param_attrs` has been stable since 1.27.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:1:58
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(feature = "unstable", feature(asm, const_fn, generic_param_attrs, dropck_eyepatch))]
[INFO] [stderr]   |                                                          ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `"docker" "inspect" "9c8c22528a38363f1f195245f197763b7cd5d6d3e34f92f3cd9c8deb89f6727d"`
[INFO] running `"docker" "rm" "-f" "9c8c22528a38363f1f195245f197763b7cd5d6d3e34f92f3cd9c8deb89f6727d"`
[INFO] [stdout] 9c8c22528a38363f1f195245f197763b7cd5d6d3e34f92f3cd9c8deb89f6727d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-0/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/mcs/0.1.1:/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=forbid" "-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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 28776a0f6a1b1901c01218ec0312f3b36edfcf82642eb6b9cf4d6abcfd7d88b6
[INFO] running `"docker" "start" "-a" "28776a0f6a1b1901c01218ec0312f3b36edfcf82642eb6b9cf4d6abcfd7d88b6"`
[INFO] [stderr]    Compiling mcs v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]    --> src/mutex.rs:117:9
[INFO] [stderr]     |
[INFO] [stderr] 117 |         unsafe {
[INFO] [stderr]     |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_unsafe)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `generic_param_attrs` has been stable since 1.27.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:1:58
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(feature = "unstable", feature(asm, const_fn, generic_param_attrs, dropck_eyepatch))]
[INFO] [stderr]   |                                                          ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.21s
[INFO] running `"docker" "inspect" "28776a0f6a1b1901c01218ec0312f3b36edfcf82642eb6b9cf4d6abcfd7d88b6"`
[INFO] running `"docker" "rm" "-f" "28776a0f6a1b1901c01218ec0312f3b36edfcf82642eb6b9cf4d6abcfd7d88b6"`
[INFO] [stdout] 28776a0f6a1b1901c01218ec0312f3b36edfcf82642eb6b9cf4d6abcfd7d88b6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-0/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/mcs/0.1.1:/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=forbid" "-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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen"`
[INFO] [stdout] 1a547c91c855f1c0ca12336eb384326254dde41a7421eba8976abf5ddb1584f3
[INFO] running `"docker" "start" "-a" "1a547c91c855f1c0ca12336eb384326254dde41a7421eba8976abf5ddb1584f3"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mcs-266c47d1366052bf
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test mutex::test::test_into_inner_drop ... ok
[INFO] [stdout] test mutex::test::smoke ... ok
[INFO] [stdout] test mutex::test::test_into_inner ... ok
[INFO] [stdout] test mutex::test::test_get_mut ... ok
[INFO] [stdout] test mutex::test::test_lock_unsized ... ok
[INFO] [stdout] test mutex::test::try_lock ... ok
[INFO] [stderr] thread '<unnamed>' panicked at 'explicit panic', src/mutex.rs:384:13
[INFO] [stderr] stack backtrace:
[INFO] [stdout] test mutex::test::lots_and_lots ... ok
[INFO] [stdout] test mutex::test::test_lock_arc_nested ... ok
[INFO] [stderr]    0:     0x55ae98219ac3 - std[698b411d1b74fcff]::sys::unix::backtrace::tracing::imp::unwind_backtrace
[INFO] [stderr]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
[INFO] [stderr]    1:     0x55ae9821582b - std[698b411d1b74fcff]::sys_common::backtrace::_print
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:70
[INFO] [stderr]    2:     0x55ae98218746 - std[698b411d1b74fcff]::panicking::default_hook::{closure#1}
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:58
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    3:     0x55ae982184c4 - std[698b411d1b74fcff]::panicking::default_hook
[INFO] [stderr]                                at src/libstd/panicking.rs:215
[INFO] [stderr]    4:     0x55ae98218e50 - std[698b411d1b74fcff]::panicking::rust_panic_with_hook
[INFO] [stderr]                                at src/libstd/panicking.rs:478
[INFO] [stderr]    5:     0x55ae982189d1 - std[698b411d1b74fcff]::panicking::continue_panic_fmt
[INFO] [stderr]                                at src/libstd/panicking.rs:385
[INFO] [stderr]    6:     0x55ae982188b5 - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:312
[INFO] [stderr]    7:     0x55ae9822ec3c - core[b849d6d0cd70c3a8]::panicking::panic_fmt
[INFO] [stderr]                                at src/libcore/panicking.rs:85
[INFO] [stderr]    8:     0x55ae9822eb7b - core[b849d6d0cd70c3a8]::panicking::panic
[INFO] [stderr]                                at src/libcore/panicking.rs:49
[INFO] [stderr]    9:     0x55ae981c2562 - mcs[1bdc518a4bb6836e]::mutex::test::test_lock_arc_access_in_unwind::{closure#0}
[INFO] [stderr]                                at src/mutex.rs:384
[INFO] [stderr]   10:     0x55ae981c6b02 - std[698b411d1b74fcff]::sys_common::backtrace::__rust_begin_short_backtrace::<mcs[1bdc518a4bb6836e]::mutex::test::test_lock_arc_access_in_unwind::{closure#0}, ()>
[INFO] [stderr]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/sys_common/backtrace.rs:135
[INFO] [stderr]   11:     0x55ae981b9b7d - <std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked::<mcs[1bdc518a4bb6836e]::mutex::test::test_lock_arc_access_in_unwind::{closure#0}, ()>::{closure#0}::{closure#0}
[INFO] [stderr]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/thread/mod.rs:469
[INFO] [stderr]   12:     0x55ae981b4380 - <std[698b411d1b74fcff]::panic::AssertUnwindSafe<<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<mcs[1bdc518a4bb6836e]::mutex::test::test_lock_arc_access_in_unwind::{closure#0}, ()>::{closure#0}::{closure#0}> as core[b849d6d0cd70c3a8]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:309
[INFO] [stderr]   13:     0x55ae981c2ac4 - std[698b411d1b74fcff]::panicking::try::do_call::<std[698b411d1b74fcff]::panic::AssertUnwindSafe<<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<mcs[1bdc518a4bb6836e]::mutex::test::test_lock_arc_access_in_unwind::{closure#0}, ()>::{closure#0}::{closure#0}>, ()>
[INFO] [stderr]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:297
[INFO] [stderr]   14:     0x55ae9821c079 - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:92
[INFO] [stderr]   15:     0x55ae981c2e1d - std[698b411d1b74fcff]::panicking::try::<(), std[698b411d1b74fcff]::panic::AssertUnwindSafe<<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<mcs[1bdc518a4bb6836e]::mutex::test::test_lock_arc_access_in_unwind::{closure#0}, ()>::{closure#0}::{closure#0}>>
[INFO] [stderr]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panicking.rs:276
[INFO] [stderr]   16:     0x55ae981b3302 - std[698b411d1b74fcff]::panic::catch_unwind::<std[698b411d1b74fcff]::panic::AssertUnwindSafe<<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<mcs[1bdc518a4bb6836e]::mutex::test::test_lock_arc_access_in_unwind::{closure#0}, ()>::{closure#0}::{closure#0}>, ()>
[INFO] [stderr]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/panic.rs:388
[INFO] [stderr]   17:     0x55ae981b9905 - <std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked::<mcs[1bdc518a4bb6836e]::mutex::test::test_lock_arc_access_in_unwind::{closure#0}, ()>::{closure#0}
[INFO] [stderr]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/libstd/thread/mod.rs:468
[INFO] [stderr]   18:     0x55ae981b9e36 - <<std[698b411d1b74fcff]::thread::Builder>::spawn_unchecked<mcs[1bdc518a4bb6836e]::mutex::test::test_lock_arc_access_in_unwind::{closure#0}, ()>::{closure#0} as alloc[f4750af829db9b76]::boxed::FnBox<()>>::call_box
[INFO] [stderr]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:734
[INFO] [stderr]   19:     0x55ae9821b79d - <std[698b411d1b74fcff]::sys::unix::thread::Thread>::new::thread_start
[INFO] [stderr]                                at /rustc/7fea0229842e79db1159ea58ad9a653b288efee9/src/liballoc/boxed.rs:744
[INFO] [stderr]                                at src/libstd/sys_common/thread.rs:14
[INFO] [stderr]                                at src/libstd/sys/unix/thread.rs:81
[INFO] [stderr]   20:     0x7fefbe15b493 - start_thread
[INFO] [stderr]   21:     0x7fefbdc86ace - __clone
[INFO] [stderr]   22:                0x0 - <unknown>
[INFO] [stdout] test mutex::test::test_lock_arc_access_in_unwind ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mcs
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/mutex.rs - mutex::Mutex (line 34) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "1a547c91c855f1c0ca12336eb384326254dde41a7421eba8976abf5ddb1584f3"`
[INFO] running `"docker" "rm" "-f" "1a547c91c855f1c0ca12336eb384326254dde41a7421eba8976abf5ddb1584f3"`
[INFO] [stdout] 1a547c91c855f1c0ca12336eb384326254dde41a7421eba8976abf5ddb1584f3