[INFO] fetching crate saloc-lib 0.0.0...
[INFO] documenting saloc-lib-0.0.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate saloc-lib 0.0.0 into /workspace/builds/worker-34/source
[INFO] validating manifest of crates.io crate saloc-lib 0.0.0 on toolchain 1.61.0
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[INFO] started tweaking crates.io crate saloc-lib 0.0.0
[INFO] finished tweaking crates.io crate saloc-lib 0.0.0
[INFO] tweaked toml for crates.io crate saloc-lib 0.0.0 written to /workspace/builds/worker-34/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
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[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] dc19bfb6347423ad13bc89030c7aba95960a1e3793638fd83230df1684decd2a
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c1056746a9211431743df62feb82d61436c0edcf70468b461712d052392d4a8b
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[INFO] [stderr]     Checking color-eyre v0.5.11
[INFO] [stderr]     Checking typestate v0.8.0
[INFO] [stderr]    Compiling saloc-lib v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting saloc-lib v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(format_args_capture, crate_visibility_modifier, test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `format_args_capture` has been stable since 1.58.0 and no longer requires an attribute to enable
[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 `saloc-lib`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name saloc_lib src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=c0680a9a3fcd2683 -L dependency=/opt/rustwide/target/debug/deps --extern ariadne=/opt/rustwide/target/debug/deps/libariadne-cef5994ba94a5e1a.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-bde738fe159aa412.rmeta --extern color_eyre=/opt/rustwide/target/debug/deps/libcolor_eyre-cf53b50cc02128bf.rmeta --extern lalrpop_util=/opt/rustwide/target/debug/deps/liblalrpop_util-8e816f849b46813f.rmeta --extern tracing=/opt/rustwide/target/debug/deps/libtracing-50ac2cb6cb63a92f.rmeta --extern tracing_subscriber=/opt/rustwide/target/debug/deps/libtracing_subscriber-c9c0f7a37a0e69c0.rmeta --extern typestate=/opt/rustwide/target/debug/deps/libtypestate-31c58b82049c677e.rmeta --cap-lints=warn --crate-version 0.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c1056746a9211431743df62feb82d61436c0edcf70468b461712d052392d4a8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1056746a9211431743df62feb82d61436c0edcf70468b461712d052392d4a8b", kill_on_drop: false }`
[INFO] [stdout] c1056746a9211431743df62feb82d61436c0edcf70468b461712d052392d4a8b