[INFO] fetching crate grappler-macros 0.1.10...
[INFO] checking grappler-macros-0.1.10 against 1.95.0 for pr-155915
[INFO] extracting crate grappler-macros 0.1.10 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate grappler-macros 0.1.10
[INFO] finished tweaking crates.io crate grappler-macros 0.1.10
[INFO] tweaked toml for crates.io crate grappler-macros 0.1.10 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate grappler-macros 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]      Locking 92 packages to latest compatible versions
[INFO] [stderr]       Adding darling v0.20.11 (available: v0.23.0)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded mmap-fixed-fixed v0.1.3
[INFO] [stderr]   Downloaded region v3.0.2
[INFO] [stderr]   Downloaded macos-libproc v0.1.0
[INFO] [stderr]   Downloaded slice-pool2 v0.4.3
[INFO] [stderr]   Downloaded grappler-core v0.1.10
[INFO] [stderr]   Downloaded skidscan v2.0.1
[INFO] [stderr]   Downloaded skidscan-macros v0.1.2
[INFO] [stderr]   Downloaded bitfield-struct v0.6.2
[INFO] [stderr]   Downloaded poggers v1.2.1
[INFO] [stderr]   Downloaded retour v0.4.0-alpha.4
[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] bb322eb62b47b86d9ca4d374a92ecdaf708dd73f6af7872e5b3c597694a47e10
[INFO] running `Command { std: "docker" "start" "-a" "bb322eb62b47b86d9ca4d374a92ecdaf708dd73f6af7872e5b3c597694a47e10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bb322eb62b47b86d9ca4d374a92ecdaf708dd73f6af7872e5b3c597694a47e10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb322eb62b47b86d9ca4d374a92ecdaf708dd73f6af7872e5b3c597694a47e10", kill_on_drop: false }`
[INFO] [stdout] bb322eb62b47b86d9ca4d374a92ecdaf708dd73f6af7872e5b3c597694a47e10
[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] 710f58572124f7dd934ddfd503027708225ba0fc55853b34783104032f0d1a32
[INFO] running `Command { std: "docker" "start" "-a" "710f58572124f7dd934ddfd503027708225ba0fc55853b34783104032f0d1a32", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]    Compiling generic-array v0.14.9
[INFO] [stderr]     Checking aho-corasick v1.1.4
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking typenum v1.20.0
[INFO] [stderr]     Checking regex-syntax v0.8.10
[INFO] [stderr]    Compiling darling_core v0.20.11
[INFO] [stderr]    Compiling bitfield-struct v0.6.2
[INFO] [stderr]     Checking iced-x86 v1.21.0
[INFO] [stderr]    Compiling ctor v0.2.9
[INFO] [stderr]     Checking ident_case v1.0.1
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking slice-pool2 v0.4.3
[INFO] [stderr]     Checking cfg-if v1.0.4
[INFO] [stderr]     Checking strsim v0.11.1
[INFO] [stderr]     Checking region v3.0.2
[INFO] [stderr]     Checking mmap-fixed-fixed v0.1.3
[INFO] [stderr]     Checking poggers v1.2.1
[INFO] [stderr]    Compiling darling_macro v0.20.11
[INFO] [stderr]     Checking regex-automata v0.4.14
[INFO] [stderr]    Compiling skidscan-macros v0.1.2
[INFO] [stderr]     Checking darling v0.20.11
[INFO] [stderr]     Checking skidscan v2.0.1
[INFO] [stderr]     Checking regex v1.12.3
[INFO] [stderr]     Checking retour v0.4.0-alpha.4
[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 Inflector v0.11.4
[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] running `Command { std: "docker" "inspect" "710f58572124f7dd934ddfd503027708225ba0fc55853b34783104032f0d1a32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "710f58572124f7dd934ddfd503027708225ba0fc55853b34783104032f0d1a32", kill_on_drop: false }`
[INFO] [stdout] 710f58572124f7dd934ddfd503027708225ba0fc55853b34783104032f0d1a32