[INFO] fetching crate relp-bin 0.0.6...
[INFO] testing relp-bin-0.0.6 against 1.75.0 for beta-1.76-1
[INFO] extracting crate relp-bin 0.0.6 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate relp-bin 0.0.6 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 relp-bin 0.0.6
[INFO] finished tweaking crates.io crate relp-bin 0.0.6
[INFO] tweaked toml for crates.io crate relp-bin 0.0.6 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate relp-bin 0.0.6 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gcd v2.0.1
[INFO] [stderr]   Downloaded enum-map-derive v0.6.0
[INFO] [stderr]   Downloaded enum-map v1.1.1
[INFO] [stderr]   Downloaded clap_derive v3.0.5
[INFO] [stderr]   Downloaded clap v3.0.5
[INFO] [stderr]   Downloaded petgraph v0.6.0
[INFO] [stderr]   Downloaded fifo-set v1.0.0
[INFO] [stderr]   Downloaded index-utils v2.2.0
[INFO] [stderr]   Downloaded cumsum v1.0.0
[INFO] [stderr]   Downloaded relp v0.2.3
[INFO] [stderr]   Downloaded relp-num v0.1.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 4b0954053319ed8c7516aad50dfe173fc63a67560115b54d3682519c2cac1282
[INFO] running `Command { std: "docker" "start" "-a" "4b0954053319ed8c7516aad50dfe173fc63a67560115b54d3682519c2cac1282", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b0954053319ed8c7516aad50dfe173fc63a67560115b54d3682519c2cac1282", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b0954053319ed8c7516aad50dfe173fc63a67560115b54d3682519c2cac1282", kill_on_drop: false }`
[INFO] [stdout] 4b0954053319ed8c7516aad50dfe173fc63a67560115b54d3682519c2cac1282
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] d80bb67d287fcc4b7df9316a36a7de7785a6acb615296606cec0b7d10480249c
[INFO] running `Command { std: "docker" "start" "-a" "d80bb67d287fcc4b7df9316a36a7de7785a6acb615296606cec0b7d10480249c", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling fixedbitset v0.4.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling gcd v2.0.1
[INFO] [stderr]    Compiling smallvec v1.7.0
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling textwrap v0.14.2
[INFO] [stderr]    Compiling cumsum v1.0.0
[INFO] [stderr]    Compiling os_str_bytes v6.0.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/smallvec-1.7.0/src/lib.rs:82:41
[INFO] [stdout]    |
[INFO] [stdout] 82 | #![cfg_attr(feature = "specialization", feature(specialization))]
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling fifo-set v1.0.0
[INFO] [stderr]    Compiling termcolor v1.1.2
[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 `smallvec` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "d80bb67d287fcc4b7df9316a36a7de7785a6acb615296606cec0b7d10480249c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d80bb67d287fcc4b7df9316a36a7de7785a6acb615296606cec0b7d10480249c", kill_on_drop: false }`
[INFO] [stdout] d80bb67d287fcc4b7df9316a36a7de7785a6acb615296606cec0b7d10480249c
