[INFO] fetching crate instance-copy-on-write 0.2.2...
[INFO] testing instance-copy-on-write-0.2.2 against 1.90.0 for beta-1.91-2
[INFO] extracting crate instance-copy-on-write 0.2.2 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate instance-copy-on-write 0.2.2
[INFO] finished tweaking crates.io crate instance-copy-on-write 0.2.2
[INFO] tweaked toml for crates.io crate instance-copy-on-write 0.2.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate instance-copy-on-write 0.2.2 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate instance-copy-on-write 0.2.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb9d0de69cb5f9a58f69cd793910e64ad11dfa08dd8ad3b7760052a3603c2530
[INFO] running `Command { std: "docker" "start" "-a" "cb9d0de69cb5f9a58f69cd793910e64ad11dfa08dd8ad3b7760052a3603c2530", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb9d0de69cb5f9a58f69cd793910e64ad11dfa08dd8ad3b7760052a3603c2530", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb9d0de69cb5f9a58f69cd793910e64ad11dfa08dd8ad3b7760052a3603c2530", kill_on_drop: false }`
[INFO] [stdout] cb9d0de69cb5f9a58f69cd793910e64ad11dfa08dd8ad3b7760052a3603c2530
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f280ba7bce9a196faaf63f64f9a2e3684ab8e19e1651be53dc3a067a327cd99
[INFO] running `Command { std: "docker" "start" "-a" "6f280ba7bce9a196faaf63f64f9a2e3684ab8e19e1651be53dc3a067a327cd99", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling instance-copy-on-write v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crossbeam_utils::Backoff`
[INFO] [stdout]   --> src/cow_mutex.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use crossbeam_utils::Backoff;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `bind` is never read
[INFO] [stdout]   --> src/cow_mutex.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct ICoWRead<'read, ITEM: fmt::Debug + Send>
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     bind: &'read ICoW<ITEM>
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ICoWRead` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `inst` is never read
[INFO] [stdout]    --> src/cow_mutex.rs:164:5
[INFO] [stdout]     |
[INFO] [stdout] 155 | pub struct ICoWLock<'lock, ITEM: fmt::Debug + Send>
[INFO] [stdout]     |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 164 |     inst: &'lock ICoW<ITEM>
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ICoWLock` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `Command { std: "docker" "inspect" "6f280ba7bce9a196faaf63f64f9a2e3684ab8e19e1651be53dc3a067a327cd99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f280ba7bce9a196faaf63f64f9a2e3684ab8e19e1651be53dc3a067a327cd99", kill_on_drop: false }`
[INFO] [stdout] 6f280ba7bce9a196faaf63f64f9a2e3684ab8e19e1651be53dc3a067a327cd99
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3fec7fafe33001ae0e05ad56101823d6a20fdcefa6df2fd7a00971d0fcb89abf
[INFO] running `Command { std: "docker" "start" "-a" "3fec7fafe33001ae0e05ad56101823d6a20fdcefa6df2fd7a00971d0fcb89abf", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `crossbeam_utils::Backoff`
[INFO] [stdout]   --> src/cow_mutex.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use crossbeam_utils::Backoff;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `bind` is never read
[INFO] [stdout]   --> src/cow_mutex.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct ICoWRead<'read, ITEM: fmt::Debug + Send>
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     bind: &'read ICoW<ITEM>
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ICoWRead` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `inst` is never read
[INFO] [stdout]    --> src/cow_mutex.rs:164:5
[INFO] [stdout]     |
[INFO] [stdout] 155 | pub struct ICoWLock<'lock, ITEM: fmt::Debug + Send>
[INFO] [stdout]     |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 164 |     inst: &'lock ICoW<ITEM>
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ICoWLock` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling instance-copy-on-write v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crossbeam_utils::Backoff`
[INFO] [stdout]   --> src/cow_mutex.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use crossbeam_utils::Backoff;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/cow_mutex.rs:704:34
[INFO] [stdout]     |
[INFO] [stdout] 704 |         struct Test { s: String };
[INFO] [stdout]     |                                  ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/cow_mutex.rs:725:34
[INFO] [stdout]     |
[INFO] [stdout] 725 |         struct Test { s: String };
[INFO] [stdout]     |                                  ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `read0`
[INFO] [stdout]    --> src/cow_mutex.rs:712:17
[INFO] [stdout]     |
[INFO] [stdout] 712 |             let read0 = icow.read();
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_read0`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `read1`
[INFO] [stdout]    --> src/cow_mutex.rs:757:13
[INFO] [stdout]     |
[INFO] [stdout] 757 |         let read1 = icow.read();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_read1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `read0`
[INFO] [stdout]    --> src/cow_mutex.rs:851:13
[INFO] [stdout]     |
[INFO] [stdout] 851 |         let read0 = icow.read();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_read0`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `read2`
[INFO] [stdout]    --> src/cow_mutex.rs:852:13
[INFO] [stdout]     |
[INFO] [stdout] 852 |         let read2 = icow.read();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_read2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `read0`
[INFO] [stdout]    --> src/cow_mutex.rs:996:17
[INFO] [stdout]     |
[INFO] [stdout] 996 |             let read0 = icow.read();
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_read0`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `read2`
[INFO] [stdout]    --> src/cow_mutex.rs:997:17
[INFO] [stdout]     |
[INFO] [stdout] 997 |             let read2 = icow.read();
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_read2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `bind` is never read
[INFO] [stdout]   --> src/cow_mutex.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct ICoWRead<'read, ITEM: fmt::Debug + Send>
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     bind: &'read ICoW<ITEM>
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ICoWRead` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `inst` is never read
[INFO] [stdout]    --> src/cow_mutex.rs:164:5
[INFO] [stdout]     |
[INFO] [stdout] 155 | pub struct ICoWLock<'lock, ITEM: fmt::Debug + Send>
[INFO] [stdout]     |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 164 |     inst: &'lock ICoW<ITEM>
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ICoWLock` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `s` is never read
[INFO] [stdout]    --> src/cow_mutex.rs:704:23
[INFO] [stdout]     |
[INFO] [stdout] 704 |         struct Test { s: String };
[INFO] [stdout]     |                ----   ^
[INFO] [stdout]     |                |
[INFO] [stdout]     |                field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Test` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `s` is never read
[INFO] [stdout]    --> src/cow_mutex.rs:725:23
[INFO] [stdout]     |
[INFO] [stdout] 725 |         struct Test { s: String };
[INFO] [stdout]     |                ----   ^
[INFO] [stdout]     |                |
[INFO] [stdout]     |                field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Test` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.06s
[INFO] running `Command { std: "docker" "inspect" "3fec7fafe33001ae0e05ad56101823d6a20fdcefa6df2fd7a00971d0fcb89abf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fec7fafe33001ae0e05ad56101823d6a20fdcefa6df2fd7a00971d0fcb89abf", kill_on_drop: false }`
[INFO] [stdout] 3fec7fafe33001ae0e05ad56101823d6a20fdcefa6df2fd7a00971d0fcb89abf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e9cd7e3a316d1353bcfb66303567377d2773e8ba6dcdfda0a20a359dbf36e40c
[INFO] running `Command { std: "docker" "start" "-a" "e9cd7e3a316d1353bcfb66303567377d2773e8ba6dcdfda0a20a359dbf36e40c", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `crossbeam_utils::Backoff`
[INFO] [stderr]   --> src/cow_mutex.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | use crossbeam_utils::Backoff;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `bind` is never read
[INFO] [stderr]   --> src/cow_mutex.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 28 | pub struct ICoWRead<'read, ITEM: fmt::Debug + Send>
[INFO] [stderr]    |            -------- field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 34 |     bind: &'read ICoW<ITEM>
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `ICoWRead` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `inst` is never read
[INFO] [stderr]    --> src/cow_mutex.rs:164:5
[INFO] [stderr]     |
[INFO] [stderr] 155 | pub struct ICoWLock<'lock, ITEM: fmt::Debug + Send>
[INFO] [stderr]     |            -------- field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 164 |     inst: &'lock ICoW<ITEM>
[INFO] [stderr]     |     ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `ICoWLock` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `instance-copy-on-write` (lib) generated 3 warnings (run `cargo fix --lib -p instance-copy-on-write` to apply 1 suggestion)
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/cow_mutex.rs:704:34
[INFO] [stderr]     |
[INFO] [stderr] 704 |         struct Test { s: String };
[INFO] [stderr]     |                                  ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/cow_mutex.rs:725:34
[INFO] [stderr]     |
[INFO] [stderr] 725 |         struct Test { s: String };
[INFO] [stderr]     |                                  ^ help: remove this semicolon
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `read0`
[INFO] [stderr]    --> src/cow_mutex.rs:712:17
[INFO] [stderr]     |
[INFO] [stderr] 712 |             let read0 = icow.read();
[INFO] [stderr]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_read0`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `read1`
[INFO] [stderr]    --> src/cow_mutex.rs:757:13
[INFO] [stderr]     |
[INFO] [stderr] 757 |         let read1 = icow.read();
[INFO] [stderr]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_read1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `read0`
[INFO] [stderr]    --> src/cow_mutex.rs:851:13
[INFO] [stderr]     |
[INFO] [stderr] 851 |         let read0 = icow.read();
[INFO] [stderr]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_read0`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `read2`
[INFO] [stderr]    --> src/cow_mutex.rs:852:13
[INFO] [stderr]     |
[INFO] [stderr] 852 |         let read2 = icow.read();
[INFO] [stderr]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_read2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `read0`
[INFO] [stderr]    --> src/cow_mutex.rs:996:17
[INFO] [stderr]     |
[INFO] [stderr] 996 |             let read0 = icow.read();
[INFO] [stderr]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_read0`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `read2`
[INFO] [stderr]    --> src/cow_mutex.rs:997:17
[INFO] [stderr]     |
[INFO] [stderr] 997 |             let read2 = icow.read();
[INFO] [stderr]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_read2`
[INFO] [stderr] 
[INFO] [stderr] warning: field `s` is never read
[INFO] [stderr]    --> src/cow_mutex.rs:704:23
[INFO] [stderr]     |
[INFO] [stderr] 704 |         struct Test { s: String };
[INFO] [stderr]     |                ----   ^
[INFO] [stderr]     |                |
[INFO] [stderr]     |                field in this struct
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Test` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `s` is never read
[INFO] [stderr]    --> src/cow_mutex.rs:725:23
[INFO] [stderr]     |
[INFO] [stderr] 725 |         struct Test { s: String };
[INFO] [stderr]     |                ----   ^
[INFO] [stderr]     |                |
[INFO] [stderr]     |                field in this struct
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Test` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `instance-copy-on-write` (lib test) generated 13 warnings (3 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/instance_copy_on_write-e48d619ccb63de1a)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test cow_mutex::test::test_3 ... ok
[INFO] [stdout] test cow_mutex::test::test_33 ... ok
[INFO] [stdout] test cow_mutex::test::test_4 ... ok
[INFO] [stdout] test cow_mutex::test::test_6 ... ok
[INFO] [stdout] test cow_mutex::test::test_5 ... ok
[INFO] [stdout] test cow_mutex::test::test_7 ... ok
[INFO] [stdout] test cow_mutex::test::test_8 has been running for over 60 seconds
[INFO] [stdout] test cow_mutex::test::test_8 ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- cow_mutex::test::test_8 stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread '<unnamed>' panicked at src/cow_mutex.rs:1014:40:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: (ExclusiveLockPending, ICoWCopy { prev_item: ICoWRead { item: Test { s: 1 }, bind: ICoW { inner: RwLock { data: Test { s: 1 }, poisoned: false, .. } } }, new_item: Test { s: 5 }, inst: ICoW { inner: RwLock { data: Test { s: 1 }, poisoned: false, .. } } })
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x557cee408f72 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x557cee408f72 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x557cee408f72 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x557cee408f72 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x557cee42e1b3 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x557cee42e1b3 - core::fmt::write::h8a494366950f23bb
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x557cee405ef3 - std::io::default_write_fmt::h7b8824096454f323
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x557cee405ef3 - std::io::Write::write_fmt::h4e71294925c334d0
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x557cee408dc2 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x557cee40a4e9 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x557cee40a31e - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x557cee3d11a4 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb6bd65493727d71a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x557cee3d11a4 - test::test_main_with_exit_callback::{{closure}}::h60217ec76a0ece4a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x557cee40aebe - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h318e4efb8c1a5689
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x557cee40aebe - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x557cee40ac8a - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x557cee409469 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x557cee40a91d - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x557cee42ccc0 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x557cee42d056 - core::result::unwrap_failed::h95bc3f5a607b2c95
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1765:5
[INFO] [stdout]   20:     0x557cee37d097 - core::result::Result<T,E>::unwrap::h921f3d6731c2ccae
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1167:23
[INFO] [stdout]   21:     0x557cee37d097 - instance_copy_on_write::cow_mutex::test::test_8::{{closure}}::h7d98511279859511
[INFO] [stdout]                                at /opt/rustwide/workdir/src/cow_mutex.rs:1014:40
[INFO] [stdout]   22:     0x557cee38103e - std::sys::backtrace::__rust_begin_short_backtrace::hac519e5166ac0873
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   23:     0x557cee374bf7 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h88dc3fd69472077e
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   24:     0x557cee37d320 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0d9e37d19ec31c32
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   25:     0x557cee38533b - std::panicking::catch_unwind::do_call::h198444872fe1f00f
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   26:     0x557cee37561b - __rust_try
[INFO] [stdout]   27:     0x557cee374550 - std::panicking::catch_unwind::ha4ac01ea155522c3
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   28:     0x557cee374550 - std::panic::catch_unwind::h1778975141a5b2c4
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   29:     0x557cee374550 - std::thread::Builder::spawn_unchecked_::{{closure}}::hf3b2010aab32172d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   30:     0x557cee375d2e - core::ops::function::FnOnce::call_once{{vtable.shim}}::h691238adf3adcc6d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   31:     0x557cee40de3f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5924238c754de3b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   32:     0x557cee40de3f - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17
[INFO] [stdout]   33:     0x79e5d114eaa4 - <unknown>
[INFO] [stdout]   34:     0x79e5d11dba34 - clone
[INFO] [stdout]   35:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] thread 'cow_mutex::test::test_8' panicked at src/cow_mutex.rs:1041:13:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: 1
[INFO] [stdout]  right: 5
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x557cee408f72 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x557cee408f72 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x557cee408f72 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x557cee408f72 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x557cee42e1b3 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x557cee42e1b3 - core::fmt::write::h8a494366950f23bb
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x557cee405ef3 - std::io::default_write_fmt::h7b8824096454f323
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x557cee405ef3 - std::io::Write::write_fmt::h4e71294925c334d0
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x557cee408dc2 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x557cee40a4e9 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x557cee40a31e - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x557cee3d11a4 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb6bd65493727d71a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x557cee3d11a4 - test::test_main_with_exit_callback::{{closure}}::h60217ec76a0ece4a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x557cee40aebe - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h318e4efb8c1a5689
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x557cee40aebe - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x557cee40ac8a - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x557cee409469 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x557cee40a91d - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x557cee42ccc0 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x557cee42cf47 - core::panicking::assert_failed_inner::h102b4539a88470c2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:448:17
[INFO] [stdout]   20:     0x557cee36eea8 - core::panicking::assert_failed::h221312d87ff92f9b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:403:5
[INFO] [stdout]   21:     0x557cee37ca7f - instance_copy_on_write::cow_mutex::test::test_8::h94f08edcf0268830
[INFO] [stdout]                                at /opt/rustwide/workdir/src/cow_mutex.rs:1041:13
[INFO] [stdout]   22:     0x557cee37c597 - instance_copy_on_write::cow_mutex::test::test_8::{{closure}}::ha3b72cf9bbe81c13
[INFO] [stdout]                                at /opt/rustwide/workdir/src/cow_mutex.rs:987:16
[INFO] [stdout]   23:     0x557cee376086 - core::ops::function::FnOnce::call_once::hd096cc56f6c6753a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   24:     0x557cee3d6a0b - core::ops::function::FnOnce::call_once::h1f9474f1347fff52
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   25:     0x557cee3d6a0b - test::__rust_begin_short_backtrace::ha52ab26e77157f03
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:648:18
[INFO] [stdout]   26:     0x557cee3d5b45 - test::run_test_in_process::{{closure}}::h229c1a11a50b261f
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:74
[INFO] [stdout]   27:     0x557cee3d5b45 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h78821afbf97b39a9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x557cee3d5b45 - std::panicking::catch_unwind::do_call::h53abf3ed5bd32ba3
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   29:     0x557cee3d5b45 - std::panicking::catch_unwind::h6deb5fe1e91873c9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   30:     0x557cee3d5b45 - std::panic::catch_unwind::hea0829b6b565654b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x557cee3d5b45 - test::run_test_in_process::hdc44dfecea3db21b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:27
[INFO] [stdout]   32:     0x557cee3d5b45 - test::run_test::{{closure}}::h0364ba59bf23f652
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:592:43
[INFO] [stdout]   33:     0x557cee399744 - test::run_test::{{closure}}::h32730b304eec05da
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:622:41
[INFO] [stdout]   34:     0x557cee399744 - std::sys::backtrace::__rust_begin_short_backtrace::h177cb952fc54ad2c
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   35:     0x557cee39d11a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h119d903520007597
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   36:     0x557cee39d11a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hab88401d606702a6
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x557cee39d11a - std::panicking::catch_unwind::do_call::h163fe12cca9901c2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   38:     0x557cee39d11a - std::panicking::catch_unwind::he81557d0e17cc1bc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   39:     0x557cee39d11a - std::panic::catch_unwind::hc2b8e79c20593955
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x557cee39d11a - std::thread::Builder::spawn_unchecked_::{{closure}}::hfa6b4978e07815cc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   41:     0x557cee39d11a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hddcd7484a13fd793
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   42:     0x557cee40de3f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5924238c754de3b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   43:     0x557cee40de3f - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17
[INFO] [stdout]   44:     0x79e5d114eaa4 - <unknown>
[INFO] [stdout]   45:     0x79e5d11dba34 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     cow_mutex::test::test_8
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 6 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 89.46s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "e9cd7e3a316d1353bcfb66303567377d2773e8ba6dcdfda0a20a359dbf36e40c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9cd7e3a316d1353bcfb66303567377d2773e8ba6dcdfda0a20a359dbf36e40c", kill_on_drop: false }`
[INFO] [stdout] e9cd7e3a316d1353bcfb66303567377d2773e8ba6dcdfda0a20a359dbf36e40c
