[INFO] fetching crate assert_no_alloc 1.0.0...
[INFO] documenting assert_no_alloc-1.0.0 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate assert_no_alloc 1.0.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate assert_no_alloc 1.0.0 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate assert_no_alloc 1.0.0
[INFO] finished tweaking crates.io crate assert_no_alloc 1.0.0
[INFO] tweaked toml for crates.io crate assert_no_alloc 1.0.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate assert_no_alloc 1.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7fcd1b40d211db28a4a24c9151ec4f09963c4fcbb003a17d42081a21306ddf09
[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" "7fcd1b40d211db28a4a24c9151ec4f09963c4fcbb003a17d42081a21306ddf09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7fcd1b40d211db28a4a24c9151ec4f09963c4fcbb003a17d42081a21306ddf09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fcd1b40d211db28a4a24c9151ec4f09963c4fcbb003a17d42081a21306ddf09", kill_on_drop: false }`
[INFO] [stdout] 7fcd1b40d211db28a4a24c9151ec4f09963c4fcbb003a17d42081a21306ddf09
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", 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] a56b99c6f35d6bc02c41bf308f554698cdcd5dbabaa13ccff40724055292c45f
[INFO] running `Command { std: "docker" "start" "-a" "a56b99c6f35d6bc02c41bf308f554698cdcd5dbabaa13ccff40724055292c45f", kill_on_drop: false }`
[INFO] [stderr]  Documenting assert_no_alloc v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | #![feature(external_doc)]
[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 `assert_no_alloc`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name assert_no_alloc src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="disable_release"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 1.0.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "a56b99c6f35d6bc02c41bf308f554698cdcd5dbabaa13ccff40724055292c45f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a56b99c6f35d6bc02c41bf308f554698cdcd5dbabaa13ccff40724055292c45f", kill_on_drop: false }`
[INFO] [stdout] a56b99c6f35d6bc02c41bf308f554698cdcd5dbabaa13ccff40724055292c45f
