[INFO] fetching crate wasefire-protocol 0.4.0...
[INFO] checking wasefire-protocol-0.4.0 against 1.95.0 for pr-155915
[INFO] extracting crate wasefire-protocol 0.4.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate wasefire-protocol 0.4.0
[INFO] finished tweaking crates.io crate wasefire-protocol 0.4.0
[INFO] tweaked toml for crates.io crate wasefire-protocol 0.4.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate wasefire-protocol 0.4.0 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 wasefire-protocol 0.4.0 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]     Blocking waiting for file lock on package cache
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0bef3ea31be32cda3d276c77ba3b8895578ae1be20a59464ab6a888049d26e8e
[INFO] running `Command { std: "docker" "start" "-a" "0bef3ea31be32cda3d276c77ba3b8895578ae1be20a59464ab6a888049d26e8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0bef3ea31be32cda3d276c77ba3b8895578ae1be20a59464ab6a888049d26e8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bef3ea31be32cda3d276c77ba3b8895578ae1be20a59464ab6a888049d26e8e", kill_on_drop: false }`
[INFO] [stdout] 0bef3ea31be32cda3d276c77ba3b8895578ae1be20a59464ab6a888049d26e8e
[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=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] 08fe38add051d0b76f64480679db6932f129a4e09dd947c06ce0e994b0204a70
[INFO] running `Command { std: "docker" "start" "-a" "08fe38add051d0b76f64480679db6932f129a4e09dd947c06ce0e994b0204a70", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustversion v1.0.21
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling portable-atomic v1.13.1
[INFO] [stderr]    Compiling quote v1.0.44
[INFO] [stderr]    Compiling syn v2.0.114
[INFO] [stderr]     Checking spin v0.10.0
[INFO] [stderr]     Checking wasefire-sync v0.1.3
[INFO] [stderr]    Compiling num_enum_derive v0.7.5
[INFO] [stderr]    Compiling wasefire-wire-derive v0.1.3
[INFO] [stderr]     Checking num_enum v0.7.5
[INFO] [stderr]     Checking wasefire-error v0.1.4
[INFO] [stderr]     Checking wasefire-common v0.1.1
[INFO] [stderr]     Checking wasefire-wire v0.1.3
[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-1949cf8c6b5b557f/wasefire-wire-0.1.3/src/lib.rs:38:1
[INFO] [stdout]    |
[INFO] [stdout] 38 | #![feature(array_try_from_fn)]
[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 `wasefire-wire` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "08fe38add051d0b76f64480679db6932f129a4e09dd947c06ce0e994b0204a70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08fe38add051d0b76f64480679db6932f129a4e09dd947c06ce0e994b0204a70", kill_on_drop: false }`
[INFO] [stdout] 08fe38add051d0b76f64480679db6932f129a4e09dd947c06ce0e994b0204a70