[INFO] fetching crate clucstr 1.1.91...
[INFO] documenting clucstr-1.1.91 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate clucstr 1.1.91 into /workspace/builds/worker-50/source
[INFO] validating manifest of crates.io crate clucstr 1.1.91 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate clucstr 1.1.91
[INFO] finished tweaking crates.io crate clucstr 1.1.91
[INFO] tweaked toml for crates.io crate clucstr 1.1.91 written to /workspace/builds/worker-50/source/Cargo.toml
[INFO] crate crates.io crate clucstr 1.1.91 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9ee707cb516b473c16d1328032ef7ccbae4701c2f185445dfb653d20fb845e99
[INFO] running `Command { std: "docker" "start" "-a" "9ee707cb516b473c16d1328032ef7ccbae4701c2f185445dfb653d20fb845e99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ee707cb516b473c16d1328032ef7ccbae4701c2f185445dfb653d20fb845e99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ee707cb516b473c16d1328032ef7ccbae4701c2f185445dfb653d20fb845e99", kill_on_drop: false }`
[INFO] [stdout] 9ee707cb516b473c16d1328032ef7ccbae4701c2f185445dfb653d20fb845e99
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 11b4af082eb97c6e085777212fe3f3912312cb70cb3850af26e4cc79e4cc17ee
[INFO] running `Command { std: "docker" "start" "-a" "11b4af082eb97c6e085777212fe3f3912312cb70cb3850af26e4cc79e4cc17ee", kill_on_drop: false }`
[INFO] [stderr]  Documenting clucstr v1.1.91 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `syntax`
[INFO] [stdout]    --> src/lib.rs:198:1
[INFO] [stdout]     |
[INFO] [stdout] 198 | extern crate syntax;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^ can't find crate
[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 E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `clucstr`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type dylib --crate-name clucstr 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 --cap-lints=warn --crate-version 1.1.91` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "11b4af082eb97c6e085777212fe3f3912312cb70cb3850af26e4cc79e4cc17ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11b4af082eb97c6e085777212fe3f3912312cb70cb3850af26e4cc79e4cc17ee", kill_on_drop: false }`
[INFO] [stdout] 11b4af082eb97c6e085777212fe3f3912312cb70cb3850af26e4cc79e4cc17ee
