[INFO] fetching crate mlua 0.6.2...
[INFO] testing mlua-0.6.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate mlua 0.6.2 into /workspace/builds/worker-38/source
[INFO] validating manifest of crates.io crate mlua 0.6.2 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] started tweaking crates.io crate mlua 0.6.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate mlua 0.6.2
[INFO] tweaked toml for crates.io crate mlua 0.6.2 written to /workspace/builds/worker-38/source/Cargo.toml
[INFO] crate crates.io crate mlua 0.6.2 already has a lockfile, it will not be regenerated
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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] 42e3d7ebcfaa35756577fa2358d7b27eaff38d1c2ba75c6e0bd32ecc3d874d7c
[INFO] running `Command { std: "docker" "start" "-a" "42e3d7ebcfaa35756577fa2358d7b27eaff38d1c2ba75c6e0bd32ecc3d874d7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42e3d7ebcfaa35756577fa2358d7b27eaff38d1c2ba75c6e0bd32ecc3d874d7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42e3d7ebcfaa35756577fa2358d7b27eaff38d1c2ba75c6e0bd32ecc3d874d7c", kill_on_drop: false }`
[INFO] [stdout] 42e3d7ebcfaa35756577fa2358d7b27eaff38d1c2ba75c6e0bd32ecc3d874d7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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] c82759b9fa8bb1be438ea8a8ba8630c78ca586b4f37f964b0e35719130a7d6eb
[INFO] running `Command { std: "docker" "start" "-a" "c82759b9fa8bb1be438ea8a8ba8630c78ca586b4f37f964b0e35719130a7d6eb", 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling cc v1.0.68
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling mlua v0.6.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: You must enable one of the features: lua54, lua53, lua52, lua51, luajit
[INFO] [stdout]    --> build/main.rs:202:5
[INFO] [stdout]     |
[INFO] [stdout] 202 |     compile_error!("You must enable one of the features: lua54, lua53, lua52, lua51, luajit");
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mlua` 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" "c82759b9fa8bb1be438ea8a8ba8630c78ca586b4f37f964b0e35719130a7d6eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c82759b9fa8bb1be438ea8a8ba8630c78ca586b4f37f964b0e35719130a7d6eb", kill_on_drop: false }`
[INFO] [stdout] c82759b9fa8bb1be438ea8a8ba8630c78ca586b4f37f964b0e35719130a7d6eb