[INFO] cloning repository https://github.com/RussellSprouts/6502-language-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RussellSprouts/6502-language-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRussellSprouts%2F6502-language-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRussellSprouts%2F6502-language-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2d77c31f2f401ed975bf0e3a4c3497bf7e297654
[INFO] documenting RussellSprouts/6502-language-rust 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%2FRussellSprouts%2F6502-language-rust" "/workspace/builds/worker-73/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-73/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RussellSprouts/6502-language-rust 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/RussellSprouts/6502-language-rust
[INFO] finished tweaking git repo https://github.com/RussellSprouts/6502-language-rust
[INFO] tweaked toml for git repo https://github.com/RussellSprouts/6502-language-rust written to /workspace/builds/worker-73/source/Cargo.toml
[INFO] crate git repo https://github.com/RussellSprouts/6502-language-rust 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded peg v0.5.4
[INFO] [stderr]   Downloaded im v10.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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] 86e467a076bee2944f8deb923e2ec4624088103f2e47dad685eb580c9c67af68
[INFO] running `Command { std: "docker" "start" "-a" "86e467a076bee2944f8deb923e2ec4624088103f2e47dad685eb580c9c67af68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86e467a076bee2944f8deb923e2ec4624088103f2e47dad685eb580c9c67af68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86e467a076bee2944f8deb923e2ec4624088103f2e47dad685eb580c9c67af68", kill_on_drop: false }`
[INFO] [stdout] 86e467a076bee2944f8deb923e2ec4624088103f2e47dad685eb580c9c67af68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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] 829284e79b80a5601f18dc29808ff49b6b748e8a93cea309cb6272dfaa5813ea
[INFO] running `Command { std: "docker" "start" "-a" "829284e79b80a5601f18dc29808ff49b6b748e8a93cea309cb6272dfaa5813ea", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling libc v0.2.39
[INFO] [stderr]    Compiling lazy_static v1.0.0
[INFO] [stderr]    Compiling regex-syntax v0.4.2
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling utf8-ranges v1.0.0
[INFO] [stderr]     Checking typed-arena v1.3.0
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling thread_local v0.3.5
[INFO] [stderr]    Compiling rustc_version v0.2.2
[INFO] [stderr]    Compiling peg v0.5.4
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]    Compiling im v10.0.0
[INFO] [stderr]     Checking regex v0.2.6
[INFO] [stderr]    Compiling compiler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting compiler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(nll)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(underscore_lifetimes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `underscore_lifetimes` has been stable since 1.26.0 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 3 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 `compiler`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name compiler main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern im=/opt/rustwide/target/debug/deps/libim-cf0e729ddf6be855.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-6021b7f8ccb5cac7.rmeta --extern typed_arena=/opt/rustwide/target/debug/deps/libtyped_arena-1d9591dcb18c85f2.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "829284e79b80a5601f18dc29808ff49b6b748e8a93cea309cb6272dfaa5813ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "829284e79b80a5601f18dc29808ff49b6b748e8a93cea309cb6272dfaa5813ea", kill_on_drop: false }`
[INFO] [stdout] 829284e79b80a5601f18dc29808ff49b6b748e8a93cea309cb6272dfaa5813ea
