[INFO] fetching crate range_bounds_map 0.3.2...
[INFO] documenting range_bounds_map-0.3.2 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate range_bounds_map 0.3.2 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate range_bounds_map 0.3.2 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate range_bounds_map 0.3.2
[INFO] finished tweaking crates.io crate range_bounds_map 0.3.2
[INFO] tweaked toml for crates.io crate range_bounds_map 0.3.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded btree_monstrousity v0.0.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f7fdce4d204ec8ef0476e18c24d85843304042b0e95d67df94c0bb4f43e5b387
[INFO] running `Command { std: "docker" "start" "-a" "f7fdce4d204ec8ef0476e18c24d85843304042b0e95d67df94c0bb4f43e5b387", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7fdce4d204ec8ef0476e18c24d85843304042b0e95d67df94c0bb4f43e5b387", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7fdce4d204ec8ef0476e18c24d85843304042b0e95d67df94c0bb4f43e5b387", kill_on_drop: false }`
[INFO] [stdout] f7fdce4d204ec8ef0476e18c24d85843304042b0e95d67df94c0bb4f43e5b387
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d8be738e5f4b8982152c9351748d1f9b7f7f924e03d3f8f036f0286551e9d9c5
[INFO] running `Command { std: "docker" "start" "-a" "d8be738e5f4b8982152c9351748d1f9b7f7f924e03d3f8f036f0286551e9d9c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]     Checking btree_monstrousity v0.0.4
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling serde_derive v1.0.196
[INFO] [stderr]     Checking serde v1.0.196
[INFO] [stderr]  Documenting range_bounds_map 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:220:1
[INFO] [stdout]     |
[INFO] [stdout] 220 | #![feature(let_chains)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:221:1
[INFO] [stdout]     |
[INFO] [stdout] 221 | #![feature(btree_cursors)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 `range_bounds_map`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.76.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name range_bounds_map src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=b65845c476b4d20b -L dependency=/opt/rustwide/target/debug/deps --extern btree_monstrousity=/opt/rustwide/target/debug/deps/libbtree_monstrousity-953410debb04cf9d.rmeta --extern either=/opt/rustwide/target/debug/deps/libeither-532681c759133013.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-f81ccc6220d80f4e.rmeta --cap-lints=warn --crate-version 0.3.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d8be738e5f4b8982152c9351748d1f9b7f7f924e03d3f8f036f0286551e9d9c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8be738e5f4b8982152c9351748d1f9b7f7f924e03d3f8f036f0286551e9d9c5", kill_on_drop: false }`
[INFO] [stdout] d8be738e5f4b8982152c9351748d1f9b7f7f924e03d3f8f036f0286551e9d9c5
