[INFO] fetching crate drone-cortex-m-svd 0.7.0...
[INFO] documenting drone-cortex-m-svd-0.7.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate drone-cortex-m-svd 0.7.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate drone-cortex-m-svd 0.7.0 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 drone-cortex-m-svd 0.7.0
[INFO] finished tweaking crates.io crate drone-cortex-m-svd 0.7.0
[INFO] tweaked toml for crates.io crate drone-cortex-m-svd 0.7.0 written to /workspace/builds/worker-13/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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 38767a2bd4f345cf9f687fac1dbb9a0b83ce9043f75c53df0953046bba3fae9e
[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" "38767a2bd4f345cf9f687fac1dbb9a0b83ce9043f75c53df0953046bba3fae9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38767a2bd4f345cf9f687fac1dbb9a0b83ce9043f75c53df0953046bba3fae9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38767a2bd4f345cf9f687fac1dbb9a0b83ce9043f75c53df0953046bba3fae9e", kill_on_drop: false }`
[INFO] [stdout] 38767a2bd4f345cf9f687fac1dbb9a0b83ce9043f75c53df0953046bba3fae9e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] e74418d3cb8495765df08d6f00b78442cd1ae44330da5e5f5661e3bceb4fe29a
[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" "e74418d3cb8495765df08d6f00b78442cd1ae44330da5e5f5661e3bceb4fe29a", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-xid v0.0.4
[INFO] [stderr]     Checking quote v0.3.15
[INFO] [stderr]     Checking xml-rs v0.3.6
[INFO] [stderr]     Checking backtrace v0.3.61
[INFO] [stderr]     Checking synom v0.11.3
[INFO] [stderr]     Checking syn v0.11.11
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking serde-xml-rs v0.2.1
[INFO] [stderr]  Documenting drone-cortex-m-svd v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(range_contains)]
[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 `drone-cortex-m-svd`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name drone_cortex_m_svd 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 failure=/opt/rustwide/target/debug/deps/libfailure-0e186ca75e8dc660.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-d9cc000a4ea0ca66.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-5678c1422d6b64cb.rmeta --extern serde_xml_rs=/opt/rustwide/target/debug/deps/libserde_xml_rs-9af2c70f2372aad4.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-f282cc1f57f3d638.so --extern syn=/opt/rustwide/target/debug/deps/libsyn-8d382bdcb88a3e05.rmeta --cap-lints=warn --crate-version 0.7.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "e74418d3cb8495765df08d6f00b78442cd1ae44330da5e5f5661e3bceb4fe29a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e74418d3cb8495765df08d6f00b78442cd1ae44330da5e5f5661e3bceb4fe29a", kill_on_drop: false }`
[INFO] [stdout] e74418d3cb8495765df08d6f00b78442cd1ae44330da5e5f5661e3bceb4fe29a
