[INFO] fetching crate detour 0.8.1...
[INFO] testing detour-0.8.1 against 1.59.0 for beta-1.60-1
[INFO] extracting crate detour 0.8.1 into /workspace/builds/worker-52/source
[INFO] validating manifest of crates.io crate detour 0.8.1 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate detour 0.8.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate detour 0.8.1
[INFO] tweaked toml for crates.io crate detour 0.8.1 written to /workspace/builds/worker-52/source/Cargo.toml
[INFO] crate crates.io crate detour 0.8.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 152b06d8c992680ed35e647bc19f7410d4ced8fe197d06595d8c18fbd303be7d
[INFO] running `Command { std: "docker" "start" "-a" "152b06d8c992680ed35e647bc19f7410d4ced8fe197d06595d8c18fbd303be7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "152b06d8c992680ed35e647bc19f7410d4ced8fe197d06595d8c18fbd303be7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "152b06d8c992680ed35e647bc19f7410d4ced8fe197d06595d8c18fbd303be7d", kill_on_drop: false }`
[INFO] [stdout] 152b06d8c992680ed35e647bc19f7410d4ced8fe197d06595d8c18fbd303be7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c5b221b081730bcf6748d56d308502060fc174fa539a14a80da06be0f95c372b
[INFO] running `Command { std: "docker" "start" "-a" "c5b221b081730bcf6748d56d308502060fc174fa539a14a80da06be0f95c372b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling slice-pool v0.4.1
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling libudis86-sys v0.2.1
[INFO] [stderr]    Compiling region v2.2.0
[INFO] [stderr]    Compiling mmap-fixed v0.1.5
[INFO] [stderr]    Compiling detour v0.8.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:3
[INFO] [stdout]   |
[INFO] [stdout] 4 |   feature(const_fn_trait_bound, unboxed_closures, abi_thiscall)
[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 `detour` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "c5b221b081730bcf6748d56d308502060fc174fa539a14a80da06be0f95c372b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5b221b081730bcf6748d56d308502060fc174fa539a14a80da06be0f95c372b", kill_on_drop: false }`
[INFO] [stdout] c5b221b081730bcf6748d56d308502060fc174fa539a14a80da06be0f95c372b