[INFO] fetching crate jupiter-contract 0.1.2...
[INFO] documenting jupiter-contract-0.1.2 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate jupiter-contract 0.1.2 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate jupiter-contract 0.1.2 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate jupiter-contract 0.1.2
[INFO] finished tweaking crates.io crate jupiter-contract 0.1.2
[INFO] tweaked toml for crates.io crate jupiter-contract 0.1.2 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a7766d84768a5848aebc1e10e635c7667e3a169d27ab5e95e2ddf605188b6d2
[INFO] running `Command { std: "docker" "start" "-a" "0a7766d84768a5848aebc1e10e635c7667e3a169d27ab5e95e2ddf605188b6d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a7766d84768a5848aebc1e10e635c7667e3a169d27ab5e95e2ddf605188b6d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a7766d84768a5848aebc1e10e635c7667e3a169d27ab5e95e2ddf605188b6d2", kill_on_drop: false }`
[INFO] [stdout] 0a7766d84768a5848aebc1e10e635c7667e3a169d27ab5e95e2ddf605188b6d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2427c7377e0af0e2a7408ae781f6de56f22abb974db6d45c87ec7737ad0cf9c
[INFO] running `Command { std: "docker" "start" "-a" "f2427c7377e0af0e2a7408ae781f6de56f22abb974db6d45c87ec7737ad0cf9c", 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]     Checking subtle v1.0.0
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking keccak v0.1.0
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stderr]     Checking serde_json v1.0.66
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]     Checking rlp v0.4.6
[INFO] [stderr]     Checking sha3 v0.8.2
[INFO] [stderr]     Checking serde_cbor v0.10.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking hmac v0.7.1
[INFO] [stderr]     Checking hmac-drbg v0.2.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking multiproof-rs v0.1.9
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/multiproof-rs-0.1.9/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax, box_patterns)]
[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 `multiproof-rs`
[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" "f2427c7377e0af0e2a7408ae781f6de56f22abb974db6d45c87ec7737ad0cf9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2427c7377e0af0e2a7408ae781f6de56f22abb974db6d45c87ec7737ad0cf9c", kill_on_drop: false }`
[INFO] [stdout] f2427c7377e0af0e2a7408ae781f6de56f22abb974db6d45c87ec7737ad0cf9c
