[INFO] fetching crate rstb 0.3.2...
[INFO] documenting rstb-0.3.2 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate rstb 0.3.2 into /workspace/builds/worker-18/source
[INFO] validating manifest of crates.io crate rstb 0.3.2 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 crates.io crate rstb 0.3.2
[INFO] finished tweaking crates.io crate rstb 0.3.2
[INFO] tweaked toml for crates.io crate rstb 0.3.2 written to /workspace/builds/worker-18/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded all_asserts v2.3.1
[INFO] [stderr]   Downloaded yaz0 v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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] c3eeeb2fd3b3dae6d3817fe65edea40b92c60d03af9bd19cc4a92776c4626ffb
[INFO] running `Command { std: "docker" "start" "-a" "c3eeeb2fd3b3dae6d3817fe65edea40b92c60d03af9bd19cc4a92776c4626ffb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3eeeb2fd3b3dae6d3817fe65edea40b92c60d03af9bd19cc4a92776c4626ffb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3eeeb2fd3b3dae6d3817fe65edea40b92c60d03af9bd19cc4a92776c4626ffb", kill_on_drop: false }`
[INFO] [stdout] c3eeeb2fd3b3dae6d3817fe65edea40b92c60d03af9bd19cc4a92776c4626ffb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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] b8004ec61b4bd01e3f0d554e208811900ca9a9f3ff5e78a3387d35b10de75799
[INFO] running `Command { std: "docker" "start" "-a" "b8004ec61b4bd01e3f0d554e208811900ca9a9f3ff5e78a3387d35b10de75799", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking crc-catalog v1.1.1
[INFO] [stderr]     Checking crc v2.1.0
[INFO] [stderr]     Checking nom v7.1.1
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]  Documenting rstb v0.3.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:49:1
[INFO] [stdout]    |
[INFO] [stdout] 49 | #![feature(exclusive_range_pattern)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 `rstb`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name rstb src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=ea1068e192cf867d -L dependency=/opt/rustwide/target/debug/deps --extern crc=/opt/rustwide/target/debug/deps/libcrc-35284258d2b8b3e2.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-248cc023f84d1e2a.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-0201a942757f7262.rmeta --cap-lints=warn --crate-version 0.3.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "b8004ec61b4bd01e3f0d554e208811900ca9a9f3ff5e78a3387d35b10de75799", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8004ec61b4bd01e3f0d554e208811900ca9a9f3ff5e78a3387d35b10de75799", kill_on_drop: false }`
[INFO] [stdout] b8004ec61b4bd01e3f0d554e208811900ca9a9f3ff5e78a3387d35b10de75799