[INFO] fetching crate divrem 1.0.0...
[INFO] testing divrem-1.0.0 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate divrem 1.0.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate divrem 1.0.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3/source/rust-toolchain
[INFO] started tweaking crates.io crate divrem 1.0.0
[INFO] finished tweaking crates.io crate divrem 1.0.0
[INFO] tweaked toml for crates.io crate divrem 1.0.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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" "+beta-2021-08-01" "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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 21d560940cce01a555f1ea412c9e9c32e17903cb3f7ee815980d8dfea0559e02
[INFO] running `Command { std: "docker" "start" "-a" "21d560940cce01a555f1ea412c9e9c32e17903cb3f7ee815980d8dfea0559e02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "21d560940cce01a555f1ea412c9e9c32e17903cb3f7ee815980d8dfea0559e02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21d560940cce01a555f1ea412c9e9c32e17903cb3f7ee815980d8dfea0559e02", kill_on_drop: false }`
[INFO] [stdout] 21d560940cce01a555f1ea412c9e9c32e17903cb3f7ee815980d8dfea0559e02
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c62da939b81d5cc770b4ebf1e16cb222d2f83bbada78d1cd240b9b88a8e0fcde
[INFO] running `Command { std: "docker" "start" "-a" "c62da939b81d5cc770b4ebf1e16cb222d2f83bbada78d1cd240b9b88a8e0fcde", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling divrem v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.51s
[INFO] running `Command { std: "docker" "inspect" "c62da939b81d5cc770b4ebf1e16cb222d2f83bbada78d1cd240b9b88a8e0fcde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c62da939b81d5cc770b4ebf1e16cb222d2f83bbada78d1cd240b9b88a8e0fcde", kill_on_drop: false }`
[INFO] [stdout] c62da939b81d5cc770b4ebf1e16cb222d2f83bbada78d1cd240b9b88a8e0fcde
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 030cef8decccc845d1b1786dc9337900dfd2287b29b409ecf9ea30ed698b0599
[INFO] running `Command { std: "docker" "start" "-a" "030cef8decccc845d1b1786dc9337900dfd2287b29b409ecf9ea30ed698b0599", kill_on_drop: false }`
[INFO] [stderr]    Compiling divrem v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> tests/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(concat_idents)]
[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 `divrem` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "030cef8decccc845d1b1786dc9337900dfd2287b29b409ecf9ea30ed698b0599", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "030cef8decccc845d1b1786dc9337900dfd2287b29b409ecf9ea30ed698b0599", kill_on_drop: false }`
[INFO] [stdout] 030cef8decccc845d1b1786dc9337900dfd2287b29b409ecf9ea30ed698b0599
