[INFO] fetching crate webgl 0.1.0...
[INFO] documenting webgl-0.1.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate webgl 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate webgl 0.1.0 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 webgl 0.1.0
[INFO] finished tweaking crates.io crate webgl 0.1.0
[INFO] tweaked toml for crates.io crate webgl 0.1.0 written to /workspace/builds/worker-4/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] [stderr]     Blocking waiting for file lock on package cache
[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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 192fdd186b1ab8feb8180ab54aef841b8c6a8ec449cdb36f66670cdcdbb498d6
[INFO] running `Command { std: "docker" "start" "-a" "192fdd186b1ab8feb8180ab54aef841b8c6a8ec449cdb36f66670cdcdbb498d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "192fdd186b1ab8feb8180ab54aef841b8c6a8ec449cdb36f66670cdcdbb498d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "192fdd186b1ab8feb8180ab54aef841b8c6a8ec449cdb36f66670cdcdbb498d6", kill_on_drop: false }`
[INFO] [stdout] 192fdd186b1ab8feb8180ab54aef841b8c6a8ec449cdb36f66670cdcdbb498d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 04dbc4b71de3ac9873b5d840cfdafd015369c715e24b77bbeba3f57411177733
[INFO] running `Command { std: "docker" "start" "-a" "04dbc4b71de3ac9873b5d840cfdafd015369c715e24b77bbeba3f57411177733", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling khronos_api v2.2.0
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]     Checking glenum v0.1.1
[INFO] [stderr]    Compiling gl_generator v0.8.0
[INFO] [stderr]    Compiling gl v0.9.0
[INFO] [stderr]  Documenting webgl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(nll)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `webgl`
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name webgl 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 gl=/opt/rustwide/target/debug/deps/libgl-b39c0a57a9884ed6.rmeta --extern glenum=/opt/rustwide/target/debug/deps/libglenum-3612c90602ec10eb.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-5678c1422d6b64cb.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-05e319b971c8ec6f.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-9010c99f689210cb.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "04dbc4b71de3ac9873b5d840cfdafd015369c715e24b77bbeba3f57411177733", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04dbc4b71de3ac9873b5d840cfdafd015369c715e24b77bbeba3f57411177733", kill_on_drop: false }`
[INFO] [stdout] 04dbc4b71de3ac9873b5d840cfdafd015369c715e24b77bbeba3f57411177733
