[INFO] fetching crate mlua_serde 0.5.1...
[INFO] documenting mlua_serde-0.5.1 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate mlua_serde 0.5.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate mlua_serde 0.5.1 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mlua_serde 0.5.1
[INFO] finished tweaking crates.io crate mlua_serde 0.5.1
[INFO] tweaked toml for crates.io crate mlua_serde 0.5.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 22f5f119a6f40d3cec09e7865a476bc06db4173b640e9794f1d030dbd89a71ef
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "22f5f119a6f40d3cec09e7865a476bc06db4173b640e9794f1d030dbd89a71ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22f5f119a6f40d3cec09e7865a476bc06db4173b640e9794f1d030dbd89a71ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22f5f119a6f40d3cec09e7865a476bc06db4173b640e9794f1d030dbd89a71ef", kill_on_drop: false }`
[INFO] [stdout] 22f5f119a6f40d3cec09e7865a476bc06db4173b640e9794f1d030dbd89a71ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "RUSTDOCFLAGS=--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f807eb5ed2a4731a56871fd08075b5481dabf11b12e43b33dc22542b5825456e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f807eb5ed2a4731a56871fd08075b5481dabf11b12e43b33dc22542b5825456e", kill_on_drop: false }`
[INFO] [stderr]    Compiling mlua v0.4.2
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stdout] error: You must enable one of the features: lua54, lua53, lua52, lua51, luajit
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mlua-0.4.2/build/main.rs:102:5
[INFO] [stdout]     |
[INFO] [stdout] 102 |     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`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f807eb5ed2a4731a56871fd08075b5481dabf11b12e43b33dc22542b5825456e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f807eb5ed2a4731a56871fd08075b5481dabf11b12e43b33dc22542b5825456e", kill_on_drop: false }`
[INFO] [stdout] f807eb5ed2a4731a56871fd08075b5481dabf11b12e43b33dc22542b5825456e