[INFO] cloning repository https://github.com/zesterer/bread
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zesterer/bread" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzesterer%2Fbread", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzesterer%2Fbread'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e45bd91c637c692f30068d3929cb89819f6ec99a
[INFO] documenting zesterer/bread against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzesterer%2Fbread" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zesterer/bread on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/zesterer/bread
[INFO] finished tweaking git repo https://github.com/zesterer/bread
[INFO] tweaked toml for git repo https://github.com/zesterer/bread written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/zesterer/bread already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/zesterer/ariadne.git`
[INFO] [stderr]     Updating git repository `https://gitlab.com/bit-refined/ranges.git`
[INFO] [stderr]     Updating git repository `https://github.com/zesterer/chumsky.git`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 049b7031b72b798d53336bbd11a471482fdb9154e8e323c5120038d82cfd2df8
[INFO] running `Command { std: "docker" "start" "-a" "049b7031b72b798d53336bbd11a471482fdb9154e8e323c5120038d82cfd2df8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "049b7031b72b798d53336bbd11a471482fdb9154e8e323c5120038d82cfd2df8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "049b7031b72b798d53336bbd11a471482fdb9154e8e323c5120038d82cfd2df8", kill_on_drop: false }`
[INFO] [stdout] 049b7031b72b798d53336bbd11a471482fdb9154e8e323c5120038d82cfd2df8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 3b652711575664725a9768c05357a24e947ea8c8d7ef3d7ec051cf5d07f67935
[INFO] running `Command { std: "docker" "start" "-a" "3b652711575664725a9768c05357a24e947ea8c8d7ef3d7ec051cf5d07f67935", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling libc v0.2.105
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling cc v1.0.71
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking smallvec v1.7.0
[INFO] [stderr]     Checking ahash v0.4.7
[INFO] [stderr]     Checking yansi v0.5.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]     Checking ranges v0.4.0 (https://gitlab.com/bit-refined/ranges.git#91f6400c)
[INFO] [stderr]     Checking tao_util v0.1.0 (/opt/rustwide/workdir/util)
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]  Documenting tao_util v0.1.0 (/opt/rustwide/workdir/util)
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking lock_api v0.4.5
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling im v15.0.0
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking ariadne v0.1.5 (https://github.com/zesterer/ariadne.git#dc1396c5)
[INFO] [stderr]    Compiling psm v0.1.17
[INFO] [stderr]    Compiling stacker v0.1.14
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking bitmaps v2.1.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking internment v0.5.4
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking chumsky v0.8.0 (https://github.com/zesterer/chumsky.git#0653848c)
[INFO] [stderr]     Checking sized-chunks v0.6.5
[INFO] [stderr]     Checking tao_syntax v0.1.0 (/opt/rustwide/workdir/syntax)
[INFO] [stderr]  Documenting tao_syntax v0.1.0 (/opt/rustwide/workdir/syntax)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> syntax/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(option_zip, trait_alias)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> syntax/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(option_zip, trait_alias)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> syntax/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(option_zip, trait_alias)]
[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 `tao_syntax`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name tao_syntax syntax/src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=c8ea86d83f202c07 -L dependency=/opt/rustwide/target/debug/deps --extern ariadne=/opt/rustwide/target/debug/deps/libariadne-f684f9c17e62cc63.rmeta --extern chumsky=/opt/rustwide/target/debug/deps/libchumsky-7972898e5ac1933a.rmeta --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-5b4919dfcb744225.rmeta --extern internment=/opt/rustwide/target/debug/deps/libinternment-8d9178d6618bb3e1.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 compile `tao_syntax` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "3b652711575664725a9768c05357a24e947ea8c8d7ef3d7ec051cf5d07f67935", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b652711575664725a9768c05357a24e947ea8c8d7ef3d7ec051cf5d07f67935", kill_on_drop: false }`
[INFO] [stdout] 3b652711575664725a9768c05357a24e947ea8c8d7ef3d7ec051cf5d07f67935