[INFO] cloning repository https://github.com/DavidMikeSimon/lotsa_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DavidMikeSimon/lotsa_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDavidMikeSimon%2Flotsa_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDavidMikeSimon%2Flotsa_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f2dbf6cb4773bbccf5cb359a68723624dee05286
[INFO] checking DavidMikeSimon/lotsa_rust against 1.55.0 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDavidMikeSimon%2Flotsa_rust" "/workspace/builds/worker-56/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-56/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DavidMikeSimon/lotsa_rust 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] removed /workspace/builds/worker-56/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/DavidMikeSimon/lotsa_rust
[INFO] finished tweaking git repo https://github.com/DavidMikeSimon/lotsa_rust
[INFO] tweaked toml for git repo https://github.com/DavidMikeSimon/lotsa_rust written to /workspace/builds/worker-56/source/Cargo.toml
[INFO] crate git repo https://github.com/DavidMikeSimon/lotsa_rust already has a lockfile, it will not be regenerated
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded js-sys v0.3.17
[INFO] [stderr]   Downloaded socket2 v0.3.10
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.40
[INFO] [stderr]   Downloaded awc v0.2.2
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.40
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.40
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.40
[INFO] [stderr]   Downloaded weedle v0.8.0
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.40
[INFO] [stderr]   Downloaded actix-web-actors v1.0.2
[INFO] [stderr]   Downloaded web-sys v0.3.17
[INFO] [stderr]   Downloaded bincode v1.1.2
[INFO] [stderr]   Downloaded actix-files v0.1.4
[INFO] [stderr]   Downloaded wasm-bindgen-webidl v0.2.40
[INFO] [stderr]   Downloaded actix-connect v0.2.2
[INFO] [stderr]   Downloaded roaring v0.6.0
[INFO] [stderr]   Downloaded serde-big-array v0.1.4
[INFO] [stderr]   Downloaded bumpalo v2.3.0
[INFO] [stderr]   Downloaded actix-http v0.2.7
[INFO] [stderr]   Downloaded wee_alloc v0.4.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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] 24936eb3c9fbe1ec2f6634eaaf633d7cb44330b576010a4b925562ed0a6495f8
[INFO] running `Command { std: "docker" "start" "-a" "24936eb3c9fbe1ec2f6634eaaf633d7cb44330b576010a4b925562ed0a6495f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "24936eb3c9fbe1ec2f6634eaaf633d7cb44330b576010a4b925562ed0a6495f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24936eb3c9fbe1ec2f6634eaaf633d7cb44330b576010a4b925562ed0a6495f8", kill_on_drop: false }`
[INFO] [stdout] 24936eb3c9fbe1ec2f6634eaaf633d7cb44330b576010a4b925562ed0a6495f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a5ef1725ce3ce2620ab75a25db5f777fdc17546186c31b6865df56fae989fb7e
[INFO] running `Command { std: "docker" "start" "-a" "a5ef1725ce3ce2620ab75a25db5f777fdc17546186c31b6865df56fae989fb7e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling cc v1.0.32
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking cfg-if v0.1.7
[INFO] [stderr]    Compiling serde-big-array v0.1.4
[INFO] [stderr]     Checking maplit v1.0.1
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]    Compiling bincode v1.1.2
[INFO] [stderr]     Checking roaring v0.6.0
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking flate2 v1.0.7
[INFO] [stderr]    Compiling serde_derive v1.0.89
[INFO] [stderr]     Checking lotsa v0.1.0 (/opt/rustwide/workdir/lotsa)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> lotsa/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> lotsa/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lotsa` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "a5ef1725ce3ce2620ab75a25db5f777fdc17546186c31b6865df56fae989fb7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5ef1725ce3ce2620ab75a25db5f777fdc17546186c31b6865df56fae989fb7e", kill_on_drop: false }`
[INFO] [stdout] a5ef1725ce3ce2620ab75a25db5f777fdc17546186c31b6865df56fae989fb7e