[INFO] fetching crate loaf 0.1.0-alpha6...
[INFO] testing loaf-0.1.0-alpha6 against 1.55.0 for beta-1.56-1
[INFO] extracting crate loaf 0.1.0-alpha6 into /workspace/builds/worker-66/source
[INFO] validating manifest of crates.io crate loaf 0.1.0-alpha6 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 loaf 0.1.0-alpha6
[INFO] finished tweaking crates.io crate loaf 0.1.0-alpha6
[INFO] tweaked toml for crates.io crate loaf 0.1.0-alpha6 written to /workspace/builds/worker-66/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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] 8a2793ce35eaf31feccac133d4aa93b14a44092801856b4171fbbe7dd717daef
[INFO] running `Command { std: "docker" "start" "-a" "8a2793ce35eaf31feccac133d4aa93b14a44092801856b4171fbbe7dd717daef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8a2793ce35eaf31feccac133d4aa93b14a44092801856b4171fbbe7dd717daef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a2793ce35eaf31feccac133d4aa93b14a44092801856b4171fbbe7dd717daef", kill_on_drop: false }`
[INFO] [stdout] 8a2793ce35eaf31feccac133d4aa93b14a44092801856b4171fbbe7dd717daef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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] c6f5ad966cf460c22e3b9bca48e76069eb7493f0fabd4ca268a1d41177c37b95
[INFO] running `Command { std: "docker" "start" "-a" "c6f5ad966cf460c22e3b9bca48e76069eb7493f0fabd4ca268a1d41177c37b95", kill_on_drop: false }`
[INFO] [stderr]    Compiling loaf v0.1.0-alpha6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `Command { std: "docker" "inspect" "c6f5ad966cf460c22e3b9bca48e76069eb7493f0fabd4ca268a1d41177c37b95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6f5ad966cf460c22e3b9bca48e76069eb7493f0fabd4ca268a1d41177c37b95", kill_on_drop: false }`
[INFO] [stdout] c6f5ad966cf460c22e3b9bca48e76069eb7493f0fabd4ca268a1d41177c37b95
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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] e9d4dc7102dc850b3b1cb08c7fe22a486e9c7f572d7797f548619b3a3bfcb2a0
[INFO] running `Command { std: "docker" "start" "-a" "e9d4dc7102dc850b3b1cb08c7fe22a486e9c7f572d7797f548619b3a3bfcb2a0", kill_on_drop: false }`
[INFO] [stderr]    Compiling loaf v0.1.0-alpha6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `Command { std: "docker" "inspect" "e9d4dc7102dc850b3b1cb08c7fe22a486e9c7f572d7797f548619b3a3bfcb2a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9d4dc7102dc850b3b1cb08c7fe22a486e9c7f572d7797f548619b3a3bfcb2a0", kill_on_drop: false }`
[INFO] [stdout] e9d4dc7102dc850b3b1cb08c7fe22a486e9c7f572d7797f548619b3a3bfcb2a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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] 78049f0ea1709c2bf7baffcd74db7d71650e380b9a15e2fa3f9c2ba3f76838f5
[INFO] running `Command { std: "docker" "start" "-a" "78049f0ea1709c2bf7baffcd74db7d71650e380b9a15e2fa3f9c2ba3f76838f5", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/loaf-34cb68bb869bf5d8)
[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]      Running tests/loaf.rs (/opt/rustwide/target/debug/deps/loaf-1177eb312912d9bc)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test deref ... ok
[INFO] [stdout] test one ... ok
[INFO] [stdout] test two ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/loaf_alloc.rs (/opt/rustwide/target/debug/deps/loaf_alloc-26b3d367d1acc9ef)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests loaf
[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] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> /opt/rustwide/workdir/src/lib.rs:2:44
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![cfg_attr(any(feature = "nightly", doc), feature(const_generics))]
[INFO] [stderr]   |                                            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "78049f0ea1709c2bf7baffcd74db7d71650e380b9a15e2fa3f9c2ba3f76838f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78049f0ea1709c2bf7baffcd74db7d71650e380b9a15e2fa3f9c2ba3f76838f5", kill_on_drop: false }`
[INFO] [stdout] 78049f0ea1709c2bf7baffcd74db7d71650e380b9a15e2fa3f9c2ba3f76838f5