[INFO] cloning repository https://github.com/ben-maclaurin/sovereign-states-quiz
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ben-maclaurin/sovereign-states-quiz" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fben-maclaurin%2Fsovereign-states-quiz", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fben-maclaurin%2Fsovereign-states-quiz'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b33d1a04e503773a686eb9b707de28c132464804
[INFO] documenting ben-maclaurin/sovereign-states-quiz against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fben-maclaurin%2Fsovereign-states-quiz" "/workspace/builds/worker-24/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-24/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ben-maclaurin/sovereign-states-quiz on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ben-maclaurin/sovereign-states-quiz
[INFO] finished tweaking git repo https://github.com/ben-maclaurin/sovereign-states-quiz
[INFO] tweaked toml for git repo https://github.com/ben-maclaurin/sovereign-states-quiz written to /workspace/builds/worker-24/source/Cargo.toml
[INFO] crate git repo https://github.com/ben-maclaurin/sovereign-states-quiz already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "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-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d291d7b73f15b289a883710fe06ee053efe371ec91a96fe79ba19d441218ba75
[INFO] running `Command { std: "docker" "start" "-a" "d291d7b73f15b289a883710fe06ee053efe371ec91a96fe79ba19d441218ba75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d291d7b73f15b289a883710fe06ee053efe371ec91a96fe79ba19d441218ba75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d291d7b73f15b289a883710fe06ee053efe371ec91a96fe79ba19d441218ba75", kill_on_drop: false }`
[INFO] [stdout] d291d7b73f15b289a883710fe06ee053efe371ec91a96fe79ba19d441218ba75
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1701a28ff9c2777411be3371abdd1fbd8cc0a708ef99515e8a624aa8612b3aa6
[INFO] running `Command { std: "docker" "start" "-a" "1701a28ff9c2777411be3371abdd1fbd8cc0a708ef99515e8a624aa8612b3aa6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling siphasher v0.3.5
[INFO] [stderr]     Checking pin-project-lite v0.2.6
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[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling futures-task v0.3.15
[INFO] [stderr]    Compiling cc v1.0.68
[INFO] [stderr]     Checking futures-sink v0.3.15
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling httparse v1.4.1
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]    Compiling futures-channel v0.3.15
[INFO] [stderr]     Checking utf-8 v0.7.6
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling openssl v0.10.35
[INFO] [stderr]     Checking precomputed-hash v0.1.1
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[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking safemem v0.3.3
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[INFO] [stderr]     Checking ego-tree v0.6.2
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]    Compiling tokio v1.7.1
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[INFO] [stderr]     Checking http v0.2.4
[INFO] [stderr]    Compiling futures-util v0.3.15
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[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]     Checking tinyvec v1.2.0
[INFO] [stderr]     Checking tracing-core v0.1.18
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[INFO] [stderr]     Checking futures v0.3.15
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[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
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[INFO] [stderr]    Compiling tokio-macros v1.2.0
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[INFO] [stderr]    Compiling cssparser v0.27.2
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling cssparser-macros v0.6.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]    Compiling derive_more v0.99.14
[INFO] [stderr]     Checking tokio-util v0.6.7
[INFO] [stderr]     Checking tokio-native-tls v0.3.0
[INFO] [stderr]     Checking tokio-stream v0.1.6
[INFO] [stderr]     Checking h2 v0.3.3
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking pin-project v1.0.7
[INFO] [stderr]     Checking tokio-tungstenite v0.13.0
[INFO] [stderr]     Checking hyper v0.14.9
[INFO] [stderr]     Checking string_cache v0.8.1
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking reqwest v0.11.4
[INFO] [stderr]     Checking warp v0.3.1
[INFO] [stderr]     Checking scraper v0.12.0
[INFO] [stderr]  Documenting rust-2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(string_remove_matches)]
[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 document `rust-2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name rust_2 src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=d6b2d3096284e59c -L dependency=/opt/rustwide/target/debug/deps --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-f5f1e269664349cc.rmeta --extern scraper=/opt/rustwide/target/debug/deps/libscraper-5ff5024a9ee06456.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-5a61040c1846f1db.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-fcc1f48f28bd70a2.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-4efc510c564330b4.rmeta --extern warp=/opt/rustwide/target/debug/deps/libwarp-907c9103540e648d.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1701a28ff9c2777411be3371abdd1fbd8cc0a708ef99515e8a624aa8612b3aa6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1701a28ff9c2777411be3371abdd1fbd8cc0a708ef99515e8a624aa8612b3aa6", kill_on_drop: false }`
[INFO] [stdout] 1701a28ff9c2777411be3371abdd1fbd8cc0a708ef99515e8a624aa8612b3aa6