[INFO] fetching crate bitman 2.0.1...
[INFO] testing bitman-2.0.1 against 1.75.0 for beta-1.76-1
[INFO] extracting crate bitman 2.0.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate bitman 2.0.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bitman 2.0.1
[INFO] finished tweaking crates.io crate bitman 2.0.1
[INFO] tweaked toml for crates.io crate bitman 2.0.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "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" "+1.75.0" "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 unarray v0.1.4
[INFO] [stderr]   Downloaded maybe-owned v0.3.4
[INFO] [stderr]   Downloaded scroll v0.11.0
[INFO] [stderr]   Downloaded clap_complete v4.4.6
[INFO] [stderr]   Downloaded lzxd v0.1.4
[INFO] [stderr]   Downloaded opener v0.6.1
[INFO] [stderr]   Downloaded pdb-addr2line v0.10.4
[INFO] [stderr]   Downloaded elsa v1.10.0
[INFO] [stderr]   Downloaded num-format v0.4.4
[INFO] [stderr]   Downloaded inferno v0.11.19
[INFO] [stderr]   Downloaded flamegraph v0.6.4
[INFO] [stderr]   Downloaded pdb v0.8.0
[INFO] [stderr]   Downloaded proptest v1.4.0
[INFO] [stderr]   Downloaded criterion v0.5.1
[INFO] [stderr]   Downloaded object v0.30.4
[INFO] [stderr]   Downloaded criterion-plot v0.5.0
[INFO] [stderr]   Downloaded str_stack v0.1.0
[INFO] [stderr]   Downloaded normpath v1.1.1
[INFO] [stderr]   Downloaded symsrv v0.2.0
[INFO] [stderr]   Downloaded cab v0.4.1
[INFO] [stderr]   Downloaded camino v1.1.6
[INFO] [stderr]   Downloaded cargo_metadata v0.18.1
[INFO] [stderr]   Downloaded binary-merge v0.1.2
[INFO] [stderr]   Downloaded anes v0.1.6
[INFO] [stderr]   Downloaded range-collections v0.2.4
[INFO] [stderr]   Downloaded cargo-platform v0.1.6
[INFO] [stderr]   Downloaded inplace-vec-builder v0.1.1
[INFO] [stderr]   Downloaded blondie v0.4.1
[INFO] [stderr]   Downloaded libc-print v0.1.22
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2854b4e09b62d49c3051dfb5d5c0eaba6280fc14609d0b0f2114dfba16f9b14e
[INFO] running `Command { std: "docker" "start" "-a" "2854b4e09b62d49c3051dfb5d5c0eaba6280fc14609d0b0f2114dfba16f9b14e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2854b4e09b62d49c3051dfb5d5c0eaba6280fc14609d0b0f2114dfba16f9b14e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2854b4e09b62d49c3051dfb5d5c0eaba6280fc14609d0b0f2114dfba16f9b14e", kill_on_drop: false }`
[INFO] [stdout] 2854b4e09b62d49c3051dfb5d5c0eaba6280fc14609d0b0f2114dfba16f9b14e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67ae6f1c64c046bd4a2f9ad7702eee3da4ce75b383358a615a176522748f86fd
[INFO] running `Command { std: "docker" "start" "-a" "67ae6f1c64c046bd4a2f9ad7702eee3da4ce75b383358a615a176522748f86fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling libc-print v0.1.22
[INFO] [stderr]    Compiling bitman v2.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(specialization)]
[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 compile `bitman` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "67ae6f1c64c046bd4a2f9ad7702eee3da4ce75b383358a615a176522748f86fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67ae6f1c64c046bd4a2f9ad7702eee3da4ce75b383358a615a176522748f86fd", kill_on_drop: false }`
[INFO] [stdout] 67ae6f1c64c046bd4a2f9ad7702eee3da4ce75b383358a615a176522748f86fd
