[INFO] fetching crate zss 1.0.0...
[INFO] documenting zss-1.0.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate zss 1.0.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate zss 1.0.0 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 zss 1.0.0
[INFO] finished tweaking crates.io crate zss 1.0.0
[INFO] tweaked toml for crates.io crate zss 1.0.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate zss 1.0.0 already has a lockfile, it will not be regenerated
[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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0754524c0a8a6fd7bc61a158d13819382113497a9edb2e18522b4503c4d53166
[INFO] running `Command { std: "docker" "start" "-a" "0754524c0a8a6fd7bc61a158d13819382113497a9edb2e18522b4503c4d53166", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0754524c0a8a6fd7bc61a158d13819382113497a9edb2e18522b4503c4d53166", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0754524c0a8a6fd7bc61a158d13819382113497a9edb2e18522b4503c4d53166", kill_on_drop: false }`
[INFO] [stdout] 0754524c0a8a6fd7bc61a158d13819382113497a9edb2e18522b4503c4d53166
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 59a775e67322301bdd8ae5c87946bd765545d3404ffefb3cef830707b52efb6f
[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" "59a775e67322301bdd8ae5c87946bd765545d3404ffefb3cef830707b52efb6f", kill_on_drop: false }`
[INFO] [stderr]     Checking takeable-option v0.5.0
[INFO] [stderr]    Compiling backtrace v0.3.59
[INFO] [stderr]    Compiling x11 v2.18.2
[INFO] [stderr]    Compiling gl_generator v0.14.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking tiff v0.6.1
[INFO] [stderr]    Compiling glium v0.30.1
[INFO] [stderr]     Checking simplelog v0.10.0
[INFO] [stderr]     Checking image v0.23.14
[INFO] [stderr]  Documenting zss v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(format_args_capture, try_blocks, drain_filter)]
[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 `zss`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name zss src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-c71486e08dde7454.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-8470f762d4b535ec.rmeta --extern glium=/opt/rustwide/target/debug/deps/libglium-0baffaa2b956aa94.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-5d9952035139c58a.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f8abb66ffc16068c.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-4542bb366682d4a6.rmeta --extern simplelog=/opt/rustwide/target/debug/deps/libsimplelog-5ff91b9620104b80.rmeta --extern x11=/opt/rustwide/target/debug/deps/libx11-d546d1f6fa562851.rmeta --cap-lints=warn --crate-version 1.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "59a775e67322301bdd8ae5c87946bd765545d3404ffefb3cef830707b52efb6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59a775e67322301bdd8ae5c87946bd765545d3404ffefb3cef830707b52efb6f", kill_on_drop: false }`
[INFO] [stdout] 59a775e67322301bdd8ae5c87946bd765545d3404ffefb3cef830707b52efb6f
