[INFO] fetching crate tailed 0.0.1...
[INFO] testing tailed-0.0.1 against 1.54.0 for beta-1.55-1
[INFO] extracting crate tailed 0.0.1 into /workspace/builds/worker-68/source
[INFO] validating manifest of crates.io crate tailed 0.0.1 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tailed 0.0.1
[INFO] finished tweaking crates.io crate tailed 0.0.1
[INFO] tweaked toml for crates.io crate tailed 0.0.1 written to /workspace/builds/worker-68/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b0645a99461b3a8a14e459deefc2c8cd9c2fd9df221fe95e119b39ced1b04be7
[INFO] running `Command { std: "docker" "start" "-a" "b0645a99461b3a8a14e459deefc2c8cd9c2fd9df221fe95e119b39ced1b04be7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b0645a99461b3a8a14e459deefc2c8cd9c2fd9df221fe95e119b39ced1b04be7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0645a99461b3a8a14e459deefc2c8cd9c2fd9df221fe95e119b39ced1b04be7", kill_on_drop: false }`
[INFO] [stdout] b0645a99461b3a8a14e459deefc2c8cd9c2fd9df221fe95e119b39ced1b04be7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 201c75bcf0f21f6ed64e8a8cea2522d2c162694d92946b0f4c12111fab0563a5
[INFO] running `Command { std: "docker" "start" "-a" "201c75bcf0f21f6ed64e8a8cea2522d2c162694d92946b0f4c12111fab0563a5", kill_on_drop: false }`
[INFO] [stderr]    Compiling tailed v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "201c75bcf0f21f6ed64e8a8cea2522d2c162694d92946b0f4c12111fab0563a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "201c75bcf0f21f6ed64e8a8cea2522d2c162694d92946b0f4c12111fab0563a5", kill_on_drop: false }`
[INFO] [stdout] 201c75bcf0f21f6ed64e8a8cea2522d2c162694d92946b0f4c12111fab0563a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8b367c600043f81e284ced9fd55301c47b39f53b0264dd4574b94f9e5176804e
[INFO] running `Command { std: "docker" "start" "-a" "8b367c600043f81e284ced9fd55301c47b39f53b0264dd4574b94f9e5176804e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling tailed v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `Command { std: "docker" "inspect" "8b367c600043f81e284ced9fd55301c47b39f53b0264dd4574b94f9e5176804e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b367c600043f81e284ced9fd55301c47b39f53b0264dd4574b94f9e5176804e", kill_on_drop: false }`
[INFO] [stdout] 8b367c600043f81e284ced9fd55301c47b39f53b0264dd4574b94f9e5176804e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c901f5267249952dd41213cec65844bbb43804998c2fa273bc9c6db3fe7ec172
[INFO] running `Command { std: "docker" "start" "-a" "c901f5267249952dd41213cec65844bbb43804998c2fa273bc9c6db3fe7ec172", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.14s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tailed-304287432e8c0cac)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tailed
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/lib.rs - Tailed<mem::MaybeUninit<H>, [u8]>::from_bytes (line 110) ... FAILED
[INFO] [stdout] test src/lib.rs - Tailed<mem::MaybeUninit<H>, [u8]>::from_bytes_with_length (line 149) ... FAILED
[INFO] [stdout] test src/lib.rs - Tailed<mem::MaybeUninit<H>, [u8]>::assume_init (line 234) ... ok
[INFO] [stdout] test src/lib.rs - Tailed<H, [T]>::from_raw_parts (line 57) ... ok
[INFO] [stdout] test src/lib.rs - Tailed<H, [T]>::from_raw_parts_mut (line 84) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - Tailed<mem::MaybeUninit<H>, [u8]>::from_bytes (line 110) stdout ----
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:109:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(maybe_uninit_extra)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read` found for union `MaybeUninit` in the current scope
[INFO] [stdout]   --> src/lib.rs:122:33
[INFO] [stdout]    |
[INFO] [stdout] 15 | assert_eq!(unsafe { tailed.head.read() }, Header {a: 0x0101, b: 0x02 });
[INFO] [stdout]    |                                 ^^^^ method not found in `MaybeUninit<Header>`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Tailed<mem::MaybeUninit<H>, [u8]>::from_bytes_with_length (line 149) stdout ----
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:148:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(maybe_uninit_extra)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read` found for union `MaybeUninit` in the current scope
[INFO] [stdout]   --> src/lib.rs:161:33
[INFO] [stdout]    |
[INFO] [stdout] 15 | assert_eq!(unsafe { tailed.head.read() }, Header {a: 0x0101, b: 0x02 });
[INFO] [stdout]    |                                 ^^^^ method not found in `MaybeUninit<Header>`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - Tailed<mem::MaybeUninit<H>, [u8]>::from_bytes (line 110)
[INFO] [stdout]     src/lib.rs - Tailed<mem::MaybeUninit<H>, [u8]>::from_bytes_with_length (line 149)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 3 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.68s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "c901f5267249952dd41213cec65844bbb43804998c2fa273bc9c6db3fe7ec172", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c901f5267249952dd41213cec65844bbb43804998c2fa273bc9c6db3fe7ec172", kill_on_drop: false }`
[INFO] [stdout] c901f5267249952dd41213cec65844bbb43804998c2fa273bc9c6db3fe7ec172
