[INFO] cloning repository https://github.com/davidbegin/messing-with-mods
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/davidbegin/messing-with-mods" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidbegin%2Fmessing-with-mods", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidbegin%2Fmessing-with-mods'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4af51b287f1e7d3f73874f22ccc108deeb5bf96a
[INFO] testing davidbegin/messing-with-mods against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidbegin%2Fmessing-with-mods" "/workspace/builds/worker-100/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-100/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/davidbegin/messing-with-mods 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] started tweaking git repo https://github.com/davidbegin/messing-with-mods
[INFO] finished tweaking git repo https://github.com/davidbegin/messing-with-mods
[INFO] tweaked toml for git repo https://github.com/davidbegin/messing-with-mods written to /workspace/builds/worker-100/source/Cargo.toml
[INFO] crate git repo https://github.com/davidbegin/messing-with-mods already has a lockfile, it will not be regenerated
[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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded kernel32-sys v0.1.0
[INFO] [stderr]   Downloaded libc v0.1.6
[INFO] [stderr]   Downloaded term v0.2.7
[INFO] [stderr]   Downloaded winapi v0.1.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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] 9be1882a150e385fca0e519e133fb2f926a387019f16e11fd2085a5647ddeec2
[INFO] running `Command { std: "docker" "start" "-a" "9be1882a150e385fca0e519e133fb2f926a387019f16e11fd2085a5647ddeec2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9be1882a150e385fca0e519e133fb2f926a387019f16e11fd2085a5647ddeec2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9be1882a150e385fca0e519e133fb2f926a387019f16e11fd2085a5647ddeec2", kill_on_drop: false }`
[INFO] [stdout] 9be1882a150e385fca0e519e133fb2f926a387019f16e11fd2085a5647ddeec2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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] 0573a6b771b576c85e749c0d4d04deee62bd955cbd8621750efa8eafc53251ec
[INFO] running `Command { std: "docker" "start" "-a" "0573a6b771b576c85e749c0d4d04deee62bd955cbd8621750efa8eafc53251ec", kill_on_drop: false }`
[INFO] [stderr]    Compiling term v0.2.7
[INFO] [stderr]    Compiling messin_with_mods v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(rustc_private)]
[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 `messin_with_mods` 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" "0573a6b771b576c85e749c0d4d04deee62bd955cbd8621750efa8eafc53251ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0573a6b771b576c85e749c0d4d04deee62bd955cbd8621750efa8eafc53251ec", kill_on_drop: false }`
[INFO] [stdout] 0573a6b771b576c85e749c0d4d04deee62bd955cbd8621750efa8eafc53251ec
