[INFO] fetching crate num-macros 0.1.40...
[INFO] testing num-macros-0.1.40 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate num-macros 0.1.40 into /workspace/builds/worker-29/source
[INFO] validating manifest of crates.io crate num-macros 0.1.40 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate num-macros 0.1.40
[INFO] finished tweaking crates.io crate num-macros 0.1.40
[INFO] tweaked toml for crates.io crate num-macros 0.1.40 written to /workspace/builds/worker-29/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a5c8a86898e67ef23c566fd2ee78791cb6478dcd1f7fd8c630737942ec9f4ad9
[INFO] running `Command { std: "docker" "start" "-a" "a5c8a86898e67ef23c566fd2ee78791cb6478dcd1f7fd8c630737942ec9f4ad9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5c8a86898e67ef23c566fd2ee78791cb6478dcd1f7fd8c630737942ec9f4ad9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5c8a86898e67ef23c566fd2ee78791cb6478dcd1f7fd8c630737942ec9f4ad9", kill_on_drop: false }`
[INFO] [stdout] a5c8a86898e67ef23c566fd2ee78791cb6478dcd1f7fd8c630737942ec9f4ad9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5800ba95e2c063f4a8cdc1a26646bf183590cdefe0599a528e8ea693000766df
[INFO] running `Command { std: "docker" "start" "-a" "5800ba95e2c063f4a8cdc1a26646bf183590cdefe0599a528e8ea693000766df", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-macros v0.1.40 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> src/lib.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![feature(plugin_registrar, rustc_private)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]    |
[INFO] [stdout]    = note: a __rustc_plugin_registrar symbol must now be defined instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `syntax`
[INFO] [stdout]   --> src/lib.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | extern crate syntax;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0463, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `num-macros` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "5800ba95e2c063f4a8cdc1a26646bf183590cdefe0599a528e8ea693000766df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5800ba95e2c063f4a8cdc1a26646bf183590cdefe0599a528e8ea693000766df", kill_on_drop: false }`
[INFO] [stdout] 5800ba95e2c063f4a8cdc1a26646bf183590cdefe0599a528e8ea693000766df