[INFO] fetching crate take_mut 0.2.2...
[INFO] testing take_mut-0.2.2 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate take_mut 0.2.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate take_mut 0.2.2 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate take_mut 0.2.2
[INFO] finished tweaking crates.io crate take_mut 0.2.2
[INFO] tweaked toml for crates.io crate take_mut 0.2.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 76b7fc331449716c430a61f7cd976ffe0d2935757ed50a40f1fba3dc1b3285fa
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "76b7fc331449716c430a61f7cd976ffe0d2935757ed50a40f1fba3dc1b3285fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76b7fc331449716c430a61f7cd976ffe0d2935757ed50a40f1fba3dc1b3285fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76b7fc331449716c430a61f7cd976ffe0d2935757ed50a40f1fba3dc1b3285fa", kill_on_drop: false }`
[INFO] [stdout] 76b7fc331449716c430a61f7cd976ffe0d2935757ed50a40f1fba3dc1b3285fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a3191f67437cc1f47a6307c59ae327ebcaa5b8fe0716381a56bd2e2e797eb91
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4a3191f67437cc1f47a6307c59ae327ebcaa5b8fe0716381a56bd2e2e797eb91", kill_on_drop: false }`
[INFO] [stderr]    Compiling take_mut v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "4a3191f67437cc1f47a6307c59ae327ebcaa5b8fe0716381a56bd2e2e797eb91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a3191f67437cc1f47a6307c59ae327ebcaa5b8fe0716381a56bd2e2e797eb91", kill_on_drop: false }`
[INFO] [stdout] 4a3191f67437cc1f47a6307c59ae327ebcaa5b8fe0716381a56bd2e2e797eb91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6deed63dba925009a812ab9bf886d11cf80cddac57c6d40be0e466332edb6c63
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6deed63dba925009a812ab9bf886d11cf80cddac57c6d40be0e466332edb6c63", kill_on_drop: false }`
[INFO] [stderr]    Compiling take_mut v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/lib.rs:141:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |             panic!("panic");
[INFO] [stdout]     |             ---------------- any code following this expression is unreachable
[INFO] [stdout] 141 |             Foo::B
[INFO] [stdout]     |             ^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/scoped.rs:153:14
[INFO] [stdout]     |
[INFO] [stdout] 153 |         let (a, a_hole) = scope.take(&mut bar.a);
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/scoped.rs:154:14
[INFO] [stdout]     |
[INFO] [stdout] 154 |         let (b, b_hole) = scope.take(&mut bar.b);
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/scoped.rs:170:18
[INFO] [stdout]     |
[INFO] [stdout] 170 |             let (t, hole) = scope.take_or_recover(&mut foo, || Foo);
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hole`
[INFO] [stdout]    --> src/scoped.rs:170:21
[INFO] [stdout]     |
[INFO] [stdout] 170 |             let (t, hole) = scope.take_or_recover(&mut foo, || Foo);
[INFO] [stdout]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_hole`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.19s
[INFO] running `Command { std: "docker" "inspect" "6deed63dba925009a812ab9bf886d11cf80cddac57c6d40be0e466332edb6c63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6deed63dba925009a812ab9bf886d11cf80cddac57c6d40be0e466332edb6c63", kill_on_drop: false }`
[INFO] [stdout] 6deed63dba925009a812ab9bf886d11cf80cddac57c6d40be0e466332edb6c63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9e78a318cd46aba389264ad06bd5206a543c27738f8cbf350f588fc2eb310424
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9e78a318cd46aba389264ad06bd5206a543c27738f8cbf350f588fc2eb310424", kill_on_drop: false }`
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/lib.rs:141:13
[INFO] [stderr]     |
[INFO] [stderr] 140 |             panic!("panic");
[INFO] [stderr]     |             ---------------- any code following this expression is unreachable
[INFO] [stderr] 141 |             Foo::B
[INFO] [stderr]     |             ^^^^^^ unreachable expression
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]    --> src/scoped.rs:153:14
[INFO] [stderr]     |
[INFO] [stderr] 153 |         let (a, a_hole) = scope.take(&mut bar.a);
[INFO] [stderr]     |              ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]    --> src/scoped.rs:154:14
[INFO] [stderr]     |
[INFO] [stderr] 154 |         let (b, b_hole) = scope.take(&mut bar.b);
[INFO] [stderr]     |              ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]    --> src/scoped.rs:170:18
[INFO] [stderr]     |
[INFO] [stderr] 170 |             let (t, hole) = scope.take_or_recover(&mut foo, || Foo);
[INFO] [stderr]     |                  ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hole`
[INFO] [stderr]    --> src/scoped.rs:170:21
[INFO] [stderr]     |
[INFO] [stderr] 170 |             let (t, hole) = scope.take_or_recover(&mut foo, || Foo);
[INFO] [stderr]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_hole`
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/take_mut-5f3d3b7ae541860b
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test it_works_recover ... ok
[INFO] [stdout] test scoped::scope_based_take ... ok
[INFO] [stdout] test it_works ... ok
[INFO] [stdout] test scoped::panic_on_recovered_panic ... ok
[INFO] [stderr]    Doc-tests take_mut
[INFO] [stdout] test it_works_recover_panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/scoped.rs - scoped (line 17) ... ignored
[INFO] [stdout] test src/lib.rs - take_or_recover (line 71) ... ok
[INFO] [stdout] test src/scoped.rs - scoped (line 5) ... ok
[INFO] [stdout] test src/lib.rs - take (line 21) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 1.24s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9e78a318cd46aba389264ad06bd5206a543c27738f8cbf350f588fc2eb310424", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e78a318cd46aba389264ad06bd5206a543c27738f8cbf350f588fc2eb310424", kill_on_drop: false }`
[INFO] [stdout] 9e78a318cd46aba389264ad06bd5206a543c27738f8cbf350f588fc2eb310424