[INFO] fetching crate take_mut 0.2.2...
[INFO] testing take_mut-0.2.2 against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] extracting crate take_mut 0.2.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate take_mut 0.2.2 on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4e4d61c8376ffadce1483e1e4638ea89a8dd8e6746f9fb9c4042ac2112fa342d
[INFO] running `Command { std: "docker" "start" "-a" "4e4d61c8376ffadce1483e1e4638ea89a8dd8e6746f9fb9c4042ac2112fa342d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e4d61c8376ffadce1483e1e4638ea89a8dd8e6746f9fb9c4042ac2112fa342d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e4d61c8376ffadce1483e1e4638ea89a8dd8e6746f9fb9c4042ac2112fa342d", kill_on_drop: false }`
[INFO] [stdout] 4e4d61c8376ffadce1483e1e4638ea89a8dd8e6746f9fb9c4042ac2112fa342d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b414bb1e3dd723119aea33ad385e3b1d1fd95ae055d6ebf4d6a7dfbf21b0ad0
[INFO] running `Command { std: "docker" "start" "-a" "7b414bb1e3dd723119aea33ad385e3b1d1fd95ae055d6ebf4d6a7dfbf21b0ad0", kill_on_drop: false }`
[INFO] [stderr]    Compiling take_mut v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "7b414bb1e3dd723119aea33ad385e3b1d1fd95ae055d6ebf4d6a7dfbf21b0ad0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b414bb1e3dd723119aea33ad385e3b1d1fd95ae055d6ebf4d6a7dfbf21b0ad0", kill_on_drop: false }`
[INFO] [stdout] 7b414bb1e3dd723119aea33ad385e3b1d1fd95ae055d6ebf4d6a7dfbf21b0ad0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4011fd0126bd2ffdd0f15f91204d659b77223c21be0cf86b5198f34a725b6a0e
[INFO] running `Command { std: "docker" "start" "-a" "4011fd0126bd2ffdd0f15f91204d659b77223c21be0cf86b5198f34a725b6a0e", kill_on_drop: false }`
[INFO] [stderr]    Compiling take_mut v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/lib.rs:46:20
[INFO] [stdout]    |
[INFO] [stdout] 46 |     enum Foo {A, B};
[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/lib.rs:105:20
[INFO] [stdout]     |
[INFO] [stdout] 105 |     enum Foo {A, B};
[INFO] [stdout]     |                    ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/lib.rs:125:23
[INFO] [stdout]     |
[INFO] [stdout] 125 |     enum Foo {A, B, C};
[INFO] [stdout]     |                       ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.56s
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4011fd0126bd2ffdd0f15f91204d659b77223c21be0cf86b5198f34a725b6a0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4011fd0126bd2ffdd0f15f91204d659b77223c21be0cf86b5198f34a725b6a0e", kill_on_drop: false }`
[INFO] [stdout] 4011fd0126bd2ffdd0f15f91204d659b77223c21be0cf86b5198f34a725b6a0e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6a5bcf1cc2a307ef484c41894b3625e5f0658067327a396d81cad4a40f5e7f96
[INFO] running `Command { std: "docker" "start" "-a" "6a5bcf1cc2a307ef484c41894b3625e5f0658067327a396d81cad4a40f5e7f96", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/lib.rs:46:20
[INFO] [stderr]    |
[INFO] [stderr] 46 |     enum Foo {A, B};
[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/lib.rs:105:20
[INFO] [stderr]     |
[INFO] [stderr] 105 |     enum Foo {A, B};
[INFO] [stderr]     |                    ^ help: remove this semicolon
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/lib.rs:125:23
[INFO] [stderr]     |
[INFO] [stderr] 125 |     enum Foo {A, B, C};
[INFO] [stderr]     |                       ^ help: remove this semicolon
[INFO] [stderr] 
[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: `take_mut` (lib test) generated 8 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/take_mut-5e472e1c2690398a)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test it_works ... ok
[INFO] [stdout] test it_works_recover ... ok
[INFO] [stdout] test scoped::scope_based_take ... ok
[INFO] [stderr]    Doc-tests take_mut
[INFO] [stdout] test it_works_recover_panic ... ok
[INFO] [stdout] test scoped::panic_on_recovered_panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[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 (line 21) ... ok
[INFO] [stdout] test src/lib.rs - take_or_recover (line 71) ... ok
[INFO] [stdout] test src/scoped.rs - scoped (line 5) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.31s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6a5bcf1cc2a307ef484c41894b3625e5f0658067327a396d81cad4a40f5e7f96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a5bcf1cc2a307ef484c41894b3625e5f0658067327a396d81cad4a40f5e7f96", kill_on_drop: false }`
[INFO] [stdout] 6a5bcf1cc2a307ef484c41894b3625e5f0658067327a396d81cad4a40f5e7f96