[INFO] fetching crate discrete_range_map 0.4.0...
[INFO] documenting discrete_range_map-0.4.0 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate discrete_range_map 0.4.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate discrete_range_map 0.4.0 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate discrete_range_map 0.4.0
[INFO] finished tweaking crates.io crate discrete_range_map 0.4.0
[INFO] tweaked toml for crates.io crate discrete_range_map 0.4.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "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-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] da57691e7416f97ea9f4ebbccf1fea98acff8e5539a89e2ab1af745ab52f2c4f
[INFO] running `Command { std: "docker" "start" "-a" "da57691e7416f97ea9f4ebbccf1fea98acff8e5539a89e2ab1af745ab52f2c4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "da57691e7416f97ea9f4ebbccf1fea98acff8e5539a89e2ab1af745ab52f2c4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da57691e7416f97ea9f4ebbccf1fea98acff8e5539a89e2ab1af745ab52f2c4f", kill_on_drop: false }`
[INFO] [stdout] da57691e7416f97ea9f4ebbccf1fea98acff8e5539a89e2ab1af745ab52f2c4f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a8f3a406888e4e16fbeff84427d8d58b3a15a9da64339f54ca174878cc93f4c2
[INFO] running `Command { std: "docker" "start" "-a" "a8f3a406888e4e16fbeff84427d8d58b3a15a9da64339f54ca174878cc93f4c2", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]    Compiling syn v2.0.15
[INFO] [stderr]     Checking btree_monstrousity v0.0.4
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]    Compiling serde_derive v1.0.160
[INFO] [stderr]     Checking serde v1.0.160
[INFO] [stderr]  Documenting discrete_range_map v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:248:1
[INFO] [stdout]     |
[INFO] [stdout] 248 | #![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:249:1
[INFO] [stdout]     |
[INFO] [stdout] 249 | #![feature(btree_cursors)]
[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:250:1
[INFO] [stdout]     |
[INFO] [stdout] 250 | #![feature(step_trait)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^
[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 `discrete_range_map`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name discrete_range_map src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e0ca32d5bfc4b923 -L dependency=/opt/rustwide/target/debug/deps --extern btree_monstrousity=/opt/rustwide/target/debug/deps/libbtree_monstrousity-60bcbebffc32a1ec.rmeta --extern either=/opt/rustwide/target/debug/deps/libeither-ac42b55423df097b.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-09e0c4d8c8682844.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-7f5aa0c9c57e86c5.rmeta --cap-lints=warn --crate-version 0.4.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "a8f3a406888e4e16fbeff84427d8d58b3a15a9da64339f54ca174878cc93f4c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8f3a406888e4e16fbeff84427d8d58b3a15a9da64339f54ca174878cc93f4c2", kill_on_drop: false }`
[INFO] [stdout] a8f3a406888e4e16fbeff84427d8d58b3a15a9da64339f54ca174878cc93f4c2
