[INFO] fetching crate divrem 1.0.0...
[INFO] testing divrem-1.0.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate divrem 1.0.0 into /workspace/builds/worker-85/source
[INFO] validating manifest of crates.io crate divrem 1.0.0 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] removed /workspace/builds/worker-85/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-85/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] [stderr]     Blocking waiting for file lock on package cache
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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] 4f39667599669b359e0ca0d27cf53eb03db48f093831bfa7087c9f933d745d79
[INFO] running `Command { std: "docker" "start" "-a" "4f39667599669b359e0ca0d27cf53eb03db48f093831bfa7087c9f933d745d79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f39667599669b359e0ca0d27cf53eb03db48f093831bfa7087c9f933d745d79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f39667599669b359e0ca0d27cf53eb03db48f093831bfa7087c9f933d745d79", kill_on_drop: false }`
[INFO] [stdout] 4f39667599669b359e0ca0d27cf53eb03db48f093831bfa7087c9f933d745d79
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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] 25158414bd392583f6bc159ea1f5e74abe1eb21251abff4972415e314a8a9f9a
[INFO] running `Command { std: "docker" "start" "-a" "25158414bd392583f6bc159ea1f5e74abe1eb21251abff4972415e314a8a9f9a", 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 2.52s
[INFO] running `Command { std: "docker" "inspect" "25158414bd392583f6bc159ea1f5e74abe1eb21251abff4972415e314a8a9f9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25158414bd392583f6bc159ea1f5e74abe1eb21251abff4972415e314a8a9f9a", kill_on_drop: false }`
[INFO] [stdout] 25158414bd392583f6bc159ea1f5e74abe1eb21251abff4972415e314a8a9f9a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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] f42e53abea88ca460398bf4102f79911269a00677f55c14275db30c2d03ace29
[INFO] running `Command { std: "docker" "start" "-a" "f42e53abea88ca460398bf4102f79911269a00677f55c14275db30c2d03ace29", 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 stable 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" "f42e53abea88ca460398bf4102f79911269a00677f55c14275db30c2d03ace29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f42e53abea88ca460398bf4102f79911269a00677f55c14275db30c2d03ace29", kill_on_drop: false }`
[INFO] [stdout] f42e53abea88ca460398bf4102f79911269a00677f55c14275db30c2d03ace29