[INFO] fetching crate fosslim 0.0.2...
[INFO] documenting fosslim-0.0.2 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate fosslim 0.0.2 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate fosslim 0.0.2 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fosslim 0.0.2
[INFO] finished tweaking crates.io crate fosslim 0.0.2
[INFO] tweaked toml for crates.io crate fosslim 0.0.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded seahash v3.0.7
[INFO] [stderr]   Downloaded rmp-serde v0.13.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e3ca89137f9889cb69cb7ea54da94916c7a3f3ffba684630dab8092c8d71fed
[INFO] running `Command { std: "docker" "start" "-a" "7e3ca89137f9889cb69cb7ea54da94916c7a3f3ffba684630dab8092c8d71fed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e3ca89137f9889cb69cb7ea54da94916c7a3f3ffba684630dab8092c8d71fed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e3ca89137f9889cb69cb7ea54da94916c7a3f3ffba684630dab8092c8d71fed", kill_on_drop: false }`
[INFO] [stdout] 7e3ca89137f9889cb69cb7ea54da94916c7a3f3ffba684630dab8092c8d71fed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f5647eff82e0362059324b41a1d969c348baba2967aee864152a22a34897ab03
[INFO] running `Command { std: "docker" "start" "-a" "f5647eff82e0362059324b41a1d969c348baba2967aee864152a22a34897ab03", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]     Checking seahash v3.0.7
[INFO] [stderr]     Checking serde_json v1.0.111
[INFO] [stderr]     Checking rmp v0.8.12
[INFO] [stderr]     Checking rmp-serde v0.13.7
[INFO] [stderr]  Documenting fosslim v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(pattern)]
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `fosslim`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --crate-type rlib --crate-type dylib --crate-name fosslim src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=2e0cf0b540c4289c -L dependency=/opt/rustwide/target/debug/deps --extern rmp_serde=/opt/rustwide/target/debug/deps/librmp_serde-83b66e911689485a.rmeta --extern seahash=/opt/rustwide/target/debug/deps/libseahash-bb8b00b2bc7bee31.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-d959715fe86d3f0d.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-d2ced8b4540a43b2.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-a16063b3c14f67da.rmeta --cap-lints=warn --crate-version 0.0.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "f5647eff82e0362059324b41a1d969c348baba2967aee864152a22a34897ab03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5647eff82e0362059324b41a1d969c348baba2967aee864152a22a34897ab03", kill_on_drop: false }`
[INFO] [stdout] f5647eff82e0362059324b41a1d969c348baba2967aee864152a22a34897ab03
