[INFO] fetching crate ironstorm_lookup 1.0.4...
[INFO] documenting ironstorm_lookup-1.0.4 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate ironstorm_lookup 1.0.4 into /workspace/builds/worker-97/source
[INFO] validating manifest of crates.io crate ironstorm_lookup 1.0.4 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 ironstorm_lookup 1.0.4
[INFO] finished tweaking crates.io crate ironstorm_lookup 1.0.4
[INFO] tweaked toml for crates.io crate ironstorm_lookup 1.0.4 written to /workspace/builds/worker-97/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/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] 86f959798e006938a521aebdab4a4ce56c1b22aab021c4c54d6ba3113bf2d2c8
[INFO] running `Command { std: "docker" "start" "-a" "86f959798e006938a521aebdab4a4ce56c1b22aab021c4c54d6ba3113bf2d2c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86f959798e006938a521aebdab4a4ce56c1b22aab021c4c54d6ba3113bf2d2c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86f959798e006938a521aebdab4a4ce56c1b22aab021c4c54d6ba3113bf2d2c8", kill_on_drop: false }`
[INFO] [stdout] 86f959798e006938a521aebdab4a4ce56c1b22aab021c4c54d6ba3113bf2d2c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/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] 84b15bf68c0a40a0c2327f88ad99cc874204c942ae38ed5690b946343b5d1662
[INFO] running `Command { std: "docker" "start" "-a" "84b15bf68c0a40a0c2327f88ad99cc874204c942ae38ed5690b946343b5d1662", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking suffix v1.2.0
[INFO] [stderr]     Checking itertools v0.5.10
[INFO] [stderr]  Documenting ironstorm_lookup v1.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(btree_range, collections_bound)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `ironstorm_lookup`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name ironstorm_lookup src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern itertools=/opt/rustwide/target/debug/deps/libitertools-00771f26f035528c.rmeta --extern suffix=/opt/rustwide/target/debug/deps/libsuffix-29fd68451a44f369.rmeta --cap-lints=warn --crate-version 1.0.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "84b15bf68c0a40a0c2327f88ad99cc874204c942ae38ed5690b946343b5d1662", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84b15bf68c0a40a0c2327f88ad99cc874204c942ae38ed5690b946343b5d1662", kill_on_drop: false }`
[INFO] [stdout] 84b15bf68c0a40a0c2327f88ad99cc874204c942ae38ed5690b946343b5d1662
