[INFO] fetching crate sparse_ranges 0.1.13...
[INFO] checking sparse_ranges-0.1.13 against 1.95.0 for pr-155915
[INFO] extracting crate sparse_ranges 0.1.13 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate sparse_ranges 0.1.13
[INFO] finished tweaking crates.io crate sparse_ranges 0.1.13
[INFO] tweaked toml for crates.io crate sparse_ranges 0.1.13 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate sparse_ranges 0.1.13 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate sparse_ranges 0.1.13 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gen_ops v0.4.0
[INFO] [stderr]   Downloaded range-set-blaze v0.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d65125bbb9ccea9d8908f666497092b4d2f14fb381e7b0ab8329ef01f7179da9
[INFO] running `Command { std: "docker" "start" "-a" "d65125bbb9ccea9d8908f666497092b4d2f14fb381e7b0ab8329ef01f7179da9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d65125bbb9ccea9d8908f666497092b4d2f14fb381e7b0ab8329ef01f7179da9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d65125bbb9ccea9d8908f666497092b4d2f14fb381e7b0ab8329ef01f7179da9", kill_on_drop: false }`
[INFO] [stdout] d65125bbb9ccea9d8908f666497092b4d2f14fb381e7b0ab8329ef01f7179da9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c7a76e23225397a0840d4310589981c516c83ecd046bad2debf97d8e6fae457
[INFO] running `Command { std: "docker" "start" "-a" "5c7a76e23225397a0840d4310589981c516c83ecd046bad2debf97d8e6fae457", kill_on_drop: false }`
[INFO] [stderr]    Compiling zerocopy v0.8.27
[INFO] [stderr]    Compiling cc v1.2.49
[INFO] [stderr]    Compiling range-set-blaze v0.4.1
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]     Checking getrandom v0.3.4
[INFO] [stderr]     Checking clap_builder v4.5.52
[INFO] [stderr]     Checking serde_json v1.0.145
[INFO] [stderr]     Checking page_size v0.6.0
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking gen_ops v0.4.0
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]    Compiling alloca v0.4.0
[INFO] [stderr]     Checking clap v4.5.52
[INFO] [stderr]    Compiling zerocopy-derive v0.8.27
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling thiserror-impl v2.0.17
[INFO] [stderr]     Checking thiserror v2.0.17
[INFO] [stderr]     Checking sparse_ranges v0.1.13 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(btree_cursors)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sparse_ranges` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5c7a76e23225397a0840d4310589981c516c83ecd046bad2debf97d8e6fae457", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c7a76e23225397a0840d4310589981c516c83ecd046bad2debf97d8e6fae457", kill_on_drop: false }`
[INFO] [stdout] 5c7a76e23225397a0840d4310589981c516c83ecd046bad2debf97d8e6fae457
