[INFO] cloning repository https://github.com/winksaville/rust-expr-reqwest
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/winksaville/rust-expr-reqwest" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwinksaville%2Frust-expr-reqwest", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwinksaville%2Frust-expr-reqwest'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d35153337077a47647c154917ac37212a65df4ef
[INFO] documenting winksaville/rust-expr-reqwest 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%2Fwinksaville%2Frust-expr-reqwest" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/winksaville/rust-expr-reqwest 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] started tweaking git repo https://github.com/winksaville/rust-expr-reqwest
[INFO] finished tweaking git repo https://github.com/winksaville/rust-expr-reqwest
[INFO] tweaked toml for git repo https://github.com/winksaville/rust-expr-reqwest written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/winksaville/rust-expr-reqwest 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 }`
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[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 7c5e80e846f96e163fc64bc8f7c7060c491fbf037018e25a49f76f0efa8b8823
[INFO] running `Command { std: "docker" "start" "-a" "7c5e80e846f96e163fc64bc8f7c7060c491fbf037018e25a49f76f0efa8b8823", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c5e80e846f96e163fc64bc8f7c7060c491fbf037018e25a49f76f0efa8b8823", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c5e80e846f96e163fc64bc8f7c7060c491fbf037018e25a49f76f0efa8b8823", kill_on_drop: false }`
[INFO] [stdout] 7c5e80e846f96e163fc64bc8f7c7060c491fbf037018e25a49f76f0efa8b8823
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] c4bd94d8d680ccecc3f518401f2a6cb303ad158946ae9aa0b78ae4467ef4ae0a
[INFO] running `Command { std: "docker" "start" "-a" "c4bd94d8d680ccecc3f518401f2a6cb303ad158946ae9aa0b78ae4467ef4ae0a", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling libc v0.2.92
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.68
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking futures-core v0.3.13
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling openssl v0.10.33
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]     Checking futures-task v0.3.13
[INFO] [stderr]    Compiling serde v1.0.125
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[INFO] [stderr]     Checking hmac v0.10.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking url v2.2.1
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.6
[INFO] [stderr]    Compiling strum_macros v0.20.1
[INFO] [stderr]     Checking strum v0.20.0
[INFO] [stderr]     Checking pin-project v1.0.6
[INFO] [stderr]     Checking tokio-util v0.6.5
[INFO] [stderr]     Checking tokio-native-tls v0.3.0
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[INFO] [stderr]     Checking serde_urlencoded v0.7.0
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[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking reqwest v0.11.2
[INFO] [stderr]  Documenting expr-reqwest v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[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 `expr-reqwest`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name expr_reqwest src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=2c58aab17692a61c -L dependency=/opt/rustwide/target/debug/deps --extern chrono=/opt/rustwide/target/debug/deps/libchrono-1a62888e020efe51.rmeta --extern hex=/opt/rustwide/target/debug/deps/libhex-e6e12260d7fb4e79.rmeta --extern hex_literal=/opt/rustwide/target/debug/deps/libhex_literal-a34ac71c7669fb21.so --extern hmac=/opt/rustwide/target/debug/deps/libhmac-1869f936bdbb6f94.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-58c381915b4511a3.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-94696213be83e14e.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-17934dc9b48349dc.rmeta --extern sha2=/opt/rustwide/target/debug/deps/libsha2-f93b5fdb89e74627.rmeta --extern strum=/opt/rustwide/target/debug/deps/libstrum-58fbe68b36c0ed80.rmeta --extern strum_macros=/opt/rustwide/target/debug/deps/libstrum_macros-aa4e7dc337686098.so --extern tokio=/opt/rustwide/target/debug/deps/libtokio-c6b5356bc69b5983.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c4bd94d8d680ccecc3f518401f2a6cb303ad158946ae9aa0b78ae4467ef4ae0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4bd94d8d680ccecc3f518401f2a6cb303ad158946ae9aa0b78ae4467ef4ae0a", kill_on_drop: false }`
[INFO] [stdout] c4bd94d8d680ccecc3f518401f2a6cb303ad158946ae9aa0b78ae4467ef4ae0a