[INFO] fetching crate mtrx 0.1.0...
[INFO] testing mtrx-0.1.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate mtrx 0.1.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate mtrx 0.1.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mtrx 0.1.0
[INFO] finished tweaking crates.io crate mtrx 0.1.0
[INFO] tweaked toml for crates.io crate mtrx 0.1.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 728e5408a8df96af7f34e8893d90ab40028713ea5a2bf00e8ea6fc069b3e41ba
[INFO] running `Command { std: "docker" "start" "-a" "728e5408a8df96af7f34e8893d90ab40028713ea5a2bf00e8ea6fc069b3e41ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "728e5408a8df96af7f34e8893d90ab40028713ea5a2bf00e8ea6fc069b3e41ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "728e5408a8df96af7f34e8893d90ab40028713ea5a2bf00e8ea6fc069b3e41ba", kill_on_drop: false }`
[INFO] [stdout] 728e5408a8df96af7f34e8893d90ab40028713ea5a2bf00e8ea6fc069b3e41ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25705e931608b1a80ac6504883f566ffd4ca4087705cfbfa857ef4298f54dd82
[INFO] running `Command { std: "docker" "start" "-a" "25705e931608b1a80ac6504883f566ffd4ca4087705cfbfa857ef4298f54dd82", kill_on_drop: false }`
[INFO] [stderr]    Compiling mtrx v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_fn)]
[INFO] [stdout]   |            ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[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 E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mtrx` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "25705e931608b1a80ac6504883f566ffd4ca4087705cfbfa857ef4298f54dd82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25705e931608b1a80ac6504883f566ffd4ca4087705cfbfa857ef4298f54dd82", kill_on_drop: false }`
[INFO] [stdout] 25705e931608b1a80ac6504883f566ffd4ca4087705cfbfa857ef4298f54dd82