[INFO] cloning repository https://github.com/nickeb96/preprocessor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nickeb96/preprocessor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnickeb96%2Fpreprocessor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnickeb96%2Fpreprocessor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 73c8cea8a2b645546d08731142313827d225edf5
[INFO] documenting nickeb96/preprocessor against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnickeb96%2Fpreprocessor" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nickeb96/preprocessor 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 git repo https://github.com/nickeb96/preprocessor
[INFO] finished tweaking git repo https://github.com/nickeb96/preprocessor
[INFO] tweaked toml for git repo https://github.com/nickeb96/preprocessor written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/nickeb96/preprocessor 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]     Updating git repository `https://github.com/nickeb96/tokenizer`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 33ada88322d9cb03ec84a6d8383b7a97dad4aba48b6f269e14d4c7d569309c3b
[INFO] running `Command { std: "docker" "start" "-a" "33ada88322d9cb03ec84a6d8383b7a97dad4aba48b6f269e14d4c7d569309c3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33ada88322d9cb03ec84a6d8383b7a97dad4aba48b6f269e14d4c7d569309c3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33ada88322d9cb03ec84a6d8383b7a97dad4aba48b6f269e14d4c7d569309c3b", kill_on_drop: false }`
[INFO] [stdout] 33ada88322d9cb03ec84a6d8383b7a97dad4aba48b6f269e14d4c7d569309c3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] c0f16393233c955c2d522dd604826dbab915ed3b12c64962314e92d4569086a7
[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" "c0f16393233c955c2d522dd604826dbab915ed3b12c64962314e92d4569086a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro-hack-impl v0.4.0
[INFO] [stderr]     Checking libc v0.2.40
[INFO] [stderr]    Compiling regex v1.0.0
[INFO] [stderr]    Compiling unindent v0.1.3
[INFO] [stderr]     Checking getopts v0.2.17
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[INFO] [stderr]     Checking regex-syntax v0.6.0
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]    Compiling proc-macro-hack v0.4.0
[INFO] [stderr]    Compiling syn v0.13.4
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/regex-1.0.0/src/lib.rs:522:34
[INFO] [stdout]     |
[INFO] [stdout] 522 | #![cfg_attr(feature = "pattern", 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 compile `regex` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c0f16393233c955c2d522dd604826dbab915ed3b12c64962314e92d4569086a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0f16393233c955c2d522dd604826dbab915ed3b12c64962314e92d4569086a7", kill_on_drop: false }`
[INFO] [stdout] c0f16393233c955c2d522dd604826dbab915ed3b12c64962314e92d4569086a7
