[INFO] fetching crate grappler-core 0.1.10...
[INFO] checking grappler-core-0.1.10 against 1.95.0 for pr-155915
[INFO] extracting crate grappler-core 0.1.10 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate grappler-core 0.1.10
[INFO] finished tweaking crates.io crate grappler-core 0.1.10
[INFO] tweaked toml for crates.io crate grappler-core 0.1.10 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate grappler-core 0.1.10 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 84 packages to latest compatible versions
[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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded skidscan v2.0.1
[INFO] [stderr]   Downloaded skidscan-macros v0.1.2
[INFO] [stderr]   Downloaded mmap-fixed-fixed v0.1.3
[INFO] [stderr]   Downloaded slice-pool2 v0.4.3
[INFO] [stderr]   Downloaded macos-libproc v0.1.0
[INFO] [stderr]   Downloaded poggers v1.2.1
[INFO] [stderr]   Downloaded ctor v0.2.9
[INFO] [stderr]   Downloaded retour v0.4.0-alpha.4
[INFO] [stderr]   Downloaded bitfield-struct v0.6.2
[INFO] [stderr]   Downloaded bindgen v0.68.1
[INFO] [stderr]   Downloaded iced-x86 v1.21.0
[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] df39ece43cfb06c1e3273176cf8d0a8192154084599e4d7b3b4ecc0655c30488
[INFO] running `Command { std: "docker" "start" "-a" "df39ece43cfb06c1e3273176cf8d0a8192154084599e4d7b3b4ecc0655c30488", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df39ece43cfb06c1e3273176cf8d0a8192154084599e4d7b3b4ecc0655c30488", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df39ece43cfb06c1e3273176cf8d0a8192154084599e4d7b3b4ecc0655c30488", kill_on_drop: false }`
[INFO] [stdout] df39ece43cfb06c1e3273176cf8d0a8192154084599e4d7b3b4ecc0655c30488
[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] 5916ff913cf34f27aed31bf39fb26f3881f23dff9aad77fa8e1a6e2f5e056969
[INFO] running `Command { std: "docker" "start" "-a" "5916ff913cf34f27aed31bf39fb26f3881f23dff9aad77fa8e1a6e2f5e056969", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling winnow v0.5.40
[INFO] [stderr]    Compiling toml_datetime v0.6.11
[INFO] [stderr]     Checking slice-pool2 v0.4.3
[INFO] [stderr]    Compiling generic-array v0.14.9
[INFO] [stderr]     Checking tracing-core v0.1.36
[INFO] [stderr]     Checking iced-x86 v1.21.0
[INFO] [stderr]     Checking mmap-fixed-fixed v0.1.3
[INFO] [stderr]     Checking region v3.0.2
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling skidscan-macros v0.1.2
[INFO] [stderr]     Checking retour v0.4.0-alpha.4
[INFO] [stderr]    Compiling tracing-attributes v0.1.31
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling ctor v0.2.9
[INFO] [stderr]    Compiling bitfield-struct v0.6.2
[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/retour-0.4.0-alpha.4/src/lib.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 5 |   feature(unboxed_closures, tuple_trait)
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking skidscan v2.0.1
[INFO] [stderr]     Checking tracing v0.1.44
[INFO] [stderr]     Checking thiserror v1.0.69
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `retour` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5916ff913cf34f27aed31bf39fb26f3881f23dff9aad77fa8e1a6e2f5e056969", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5916ff913cf34f27aed31bf39fb26f3881f23dff9aad77fa8e1a6e2f5e056969", kill_on_drop: false }`
[INFO] [stdout] 5916ff913cf34f27aed31bf39fb26f3881f23dff9aad77fa8e1a6e2f5e056969