[INFO] fetching crate ironstorm_lookup 1.0.4...
[INFO] documenting ironstorm_lookup-1.0.4 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate ironstorm_lookup 1.0.4 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate ironstorm_lookup 1.0.4 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "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-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded itertools v0.5.10
[INFO] [stderr]   Downloaded suffix v1.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f22eec791fe4d93b781e5b7d94a184bcf6213fb3ceb8385dcf76e2a836f7216
[INFO] running `Command { std: "docker" "start" "-a" "0f22eec791fe4d93b781e5b7d94a184bcf6213fb3ceb8385dcf76e2a836f7216", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f22eec791fe4d93b781e5b7d94a184bcf6213fb3ceb8385dcf76e2a836f7216", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f22eec791fe4d93b781e5b7d94a184bcf6213fb3ceb8385dcf76e2a836f7216", kill_on_drop: false }`
[INFO] [stdout] 0f22eec791fe4d93b781e5b7d94a184bcf6213fb3ceb8385dcf76e2a836f7216
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e6b04ab4ee9b064134e0c3adf868b09230300f51991eaf3c9ec2c6912f1bcc1
[INFO] running `Command { std: "docker" "start" "-a" "2e6b04ab4ee9b064134e0c3adf868b09230300f51991eaf3c9ec2c6912f1bcc1", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking suffix v1.3.0
[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:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(btree_range, collections_bound)]
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:25
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(btree_range, collections_bound)]
[INFO] [stdout]   |                         ^^^^^^^^^^^^^^^^^
[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,artifacts,future-incompat --document-private-items -C metadata=75e2feef0dbf3e06 -L dependency=/opt/rustwide/target/debug/deps --extern itertools=/opt/rustwide/target/debug/deps/libitertools-48d313e131b2dbb5.rmeta --extern suffix=/opt/rustwide/target/debug/deps/libsuffix-5dbe5d7a89fc3662.rmeta --cap-lints=warn --crate-version 1.0.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "2e6b04ab4ee9b064134e0c3adf868b09230300f51991eaf3c9ec2c6912f1bcc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e6b04ab4ee9b064134e0c3adf868b09230300f51991eaf3c9ec2c6912f1bcc1", kill_on_drop: false }`
[INFO] [stdout] 2e6b04ab4ee9b064134e0c3adf868b09230300f51991eaf3c9ec2c6912f1bcc1
