[INFO] crate take_mut 0.2.2 is already in cache
[INFO] extracting crate take_mut 0.2.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/take_mut/0.2.2
[INFO] extracting crate take_mut 0.2.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/take_mut/0.2.2
[INFO] validating manifest of take_mut-0.2.2 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 take_mut-0.2.2 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 take_mut-0.2.2
[INFO] finished frobbing take_mut-0.2.2
[INFO] frobbed toml for take_mut-0.2.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/take_mut/0.2.2/Cargo.toml
[INFO] started frobbing take_mut-0.2.2
[INFO] finished frobbing take_mut-0.2.2
[INFO] frobbed toml for take_mut-0.2.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/take_mut/0.2.2/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 take_mut-0.2.2 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-4/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/take_mut/0.2.2:/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] 8e346047bbde9cd17d4af54762e17fc73c720bbb3afbb96ff9ad0bf1c8d5f882
[INFO] running `"docker" "start" "-a" "8e346047bbde9cd17d4af54762e17fc73c720bbb3afbb96ff9ad0bf1c8d5f882"`
[INFO] [stderr]    Compiling take_mut v0.2.2 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `"docker" "inspect" "8e346047bbde9cd17d4af54762e17fc73c720bbb3afbb96ff9ad0bf1c8d5f882"`
[INFO] running `"docker" "rm" "-f" "8e346047bbde9cd17d4af54762e17fc73c720bbb3afbb96ff9ad0bf1c8d5f882"`
[INFO] [stdout] 8e346047bbde9cd17d4af54762e17fc73c720bbb3afbb96ff9ad0bf1c8d5f882
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/take_mut/0.2.2:/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] 96845e904ced7583bceaf6698f0e01dbcb76b79aff34fbcce4a3885437a4096e
[INFO] running `"docker" "start" "-a" "96845e904ced7583bceaf6698f0e01dbcb76b79aff34fbcce4a3885437a4096e"`
[INFO] [stderr]    Compiling take_mut v0.2.2 (/opt/crater/workdir)
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/lib.rs:141:13
[INFO] [stderr]     |
[INFO] [stderr] 141 |             Foo::B
[INFO] [stderr]     |             ^^^^^^
[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: consider prefixing 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: consider prefixing 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: consider prefixing 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: consider prefixing with an underscore: `_hole`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `"docker" "inspect" "96845e904ced7583bceaf6698f0e01dbcb76b79aff34fbcce4a3885437a4096e"`
[INFO] running `"docker" "rm" "-f" "96845e904ced7583bceaf6698f0e01dbcb76b79aff34fbcce4a3885437a4096e"`
[INFO] [stdout] 96845e904ced7583bceaf6698f0e01dbcb76b79aff34fbcce4a3885437a4096e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/take_mut/0.2.2:/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] 8941f99374f7c735c39b13eb54c4038c75b333e0b4627aa570fab6d9f29ea38e
[INFO] running `"docker" "start" "-a" "8941f99374f7c735c39b13eb54c4038c75b333e0b4627aa570fab6d9f29ea38e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/take_mut-db61d5fa6269b910
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test scoped::scope_based_take ... ok
[INFO] [stdout] test it_works ... ok
[INFO] [stdout] test it_works_recover ... ok
[INFO] [stdout] test it_works_recover_panic ... ok
[INFO] [stdout] test scoped::panic_on_recovered_panic ... ok
[INFO] [stderr]    Doc-tests take_mut
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "8941f99374f7c735c39b13eb54c4038c75b333e0b4627aa570fab6d9f29ea38e"`
[INFO] running `"docker" "rm" "-f" "8941f99374f7c735c39b13eb54c4038c75b333e0b4627aa570fab6d9f29ea38e"`
[INFO] [stdout] 8941f99374f7c735c39b13eb54c4038c75b333e0b4627aa570fab6d9f29ea38e