[INFO] fetching crate butcher 0.5.0...
[INFO] testing butcher-0.5.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate butcher 0.5.0 into /workspace/builds/worker-84/source
[INFO] validating manifest of crates.io crate butcher 0.5.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate butcher 0.5.0
[INFO] finished tweaking crates.io crate butcher 0.5.0
[INFO] tweaked toml for crates.io crate butcher 0.5.0 written to /workspace/builds/worker-84/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c90a83b20f12cc6e959433d7ef36e94f2d90dbb5afe6753434a2ed42d2b29ecc
[INFO] running `Command { std: "docker" "start" "-a" "c90a83b20f12cc6e959433d7ef36e94f2d90dbb5afe6753434a2ed42d2b29ecc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c90a83b20f12cc6e959433d7ef36e94f2d90dbb5afe6753434a2ed42d2b29ecc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c90a83b20f12cc6e959433d7ef36e94f2d90dbb5afe6753434a2ed42d2b29ecc", kill_on_drop: false }`
[INFO] [stdout] c90a83b20f12cc6e959433d7ef36e94f2d90dbb5afe6753434a2ed42d2b29ecc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c8679558636c0a0c035d1368efee08bfb367504f22994e2632f3442d8e24aec3
[INFO] running `Command { std: "docker" "start" "-a" "c8679558636c0a0c035d1368efee08bfb367504f22994e2632f3442d8e24aec3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling butcher_proc_macro v0.5.1
[INFO] [stderr]    Compiling butcher v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 56.27s
[INFO] running `Command { std: "docker" "inspect" "c8679558636c0a0c035d1368efee08bfb367504f22994e2632f3442d8e24aec3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8679558636c0a0c035d1368efee08bfb367504f22994e2632f3442d8e24aec3", kill_on_drop: false }`
[INFO] [stdout] c8679558636c0a0c035d1368efee08bfb367504f22994e2632f3442d8e24aec3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f979269d160c60bc96ff9f39e6c8909a073cb47c60c945aedf778a30654d4dcc
[INFO] running `Command { std: "docker" "start" "-a" "f979269d160c60bc96ff9f39e6c8909a073cb47c60c945aedf778a30654d4dcc", kill_on_drop: false }`
[INFO] [stderr]    Compiling butcher v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.03s
[INFO] running `Command { std: "docker" "inspect" "f979269d160c60bc96ff9f39e6c8909a073cb47c60c945aedf778a30654d4dcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f979269d160c60bc96ff9f39e6c8909a073cb47c60c945aedf778a30654d4dcc", kill_on_drop: false }`
[INFO] [stdout] f979269d160c60bc96ff9f39e6c8909a073cb47c60c945aedf778a30654d4dcc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9e1cbed0c832d8d71926ab01b2bc04457e561054e4bf08c63c56edf4a03e94e9
[INFO] running `Command { std: "docker" "start" "-a" "9e1cbed0c832d8d71926ab01b2bc04457e561054e4bf08c63c56edf4a03e94e9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.55s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/butcher-3f92bdd7d32f3ef0)
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test as_deref::flatten_fn::as_deref_cow_box_str_borrowed ... ok
[INFO] [stdout] test as_deref::flatten_fn::as_deref_cow_box_str_owned ... ok
[INFO] [stdout] test as_deref::flatten_fn::as_deref_cow_string_borrowed ... ok
[INFO] [stdout] test as_deref::flatten_fn::as_deref_cow_string_owned ... ok
[INFO] [stdout] test flatten::tests::borrowed_borrowed ... ok
[INFO] [stdout] test flatten::tests::borrowed_owned ... ok
[INFO] [stdout] test flatten::tests::owned_owned ... ok
[INFO] [stdout] test flatten::tests::owned_borrowed ... ok
[INFO] [stdout] test iterator::cow_iter::iterator_borrowed ... ok
[INFO] [stdout] test iterator::cow_iter::iterator_owned ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests butcher
[INFO] [stdout] 
[INFO] [stdout] running 21 tests
[INFO] [stdout] test src/deriving_butcher_struct.rs - deriving_butcher_struct (line 212) - compile fail ... ok
[INFO] [stdout] test src/deriving_butcher_struct.rs - deriving_butcher_struct (line 237) ... ok
[INFO] [stdout] test src/iterator.rs - iterator::CowIter (line 37) ... ok
[INFO] [stdout] test src/deriving_butcher_enum.rs - deriving_butcher_enum (line 48) ... ok
[INFO] [stdout] test src/deriving_butcher_struct.rs - deriving_butcher_struct (line 10) ... ok
[INFO] [stdout] test src/iterator.rs - iterator::CowIter (line 20) ... ok
[INFO] [stdout] test src/deriving_butcher_enum.rs - deriving_butcher_enum (line 28) ... ok
[INFO] [stdout] test src/deriving_butcher_struct.rs - deriving_butcher_struct (line 172) ... ok
[INFO] [stdout] test src/flatten.rs - flatten::FlattenCow (line 40) ... ok
[INFO] [stdout] test src/deriving_butcher_enum.rs - deriving_butcher_enum (line 59) ... ok
[INFO] [stdout] test src/flatten.rs - flatten::FlattenCow (line 26) ... ok
[INFO] [stdout] test src/as_deref.rs - as_deref::AsDerefCow (line 33) ... ok
[INFO] [stdout] test src/deriving_butcher_enum.rs - deriving_butcher_enum (line 12) ... ok
[INFO] [stdout] test src/lib.rs - (line 35) ... ok
[INFO] [stdout] test src/lib.rs - (line 68) ... ok
[INFO] [stdout] test src/deriving_butcher_struct.rs - deriving_butcher_struct (line 43) ... ok
[INFO] [stdout] test src/deriving_butcher_struct.rs - deriving_butcher_struct (line 104) ... ok
[INFO] [stdout] test src/lib.rs - (line 16) ... ok
[INFO] [stdout] test src/methods.rs - methods::Rebutcher (line 201) ... ok
[INFO] [stdout] test src/deriving_butcher_struct.rs - deriving_butcher_struct (line 22) ... ok
[INFO] [stdout] test src/deriving_butcher_struct.rs - deriving_butcher_struct (line 69) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 21 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.49s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9e1cbed0c832d8d71926ab01b2bc04457e561054e4bf08c63c56edf4a03e94e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e1cbed0c832d8d71926ab01b2bc04457e561054e4bf08c63c56edf4a03e94e9", kill_on_drop: false }`
[INFO] [stdout] 9e1cbed0c832d8d71926ab01b2bc04457e561054e4bf08c63c56edf4a03e94e9