[INFO] cloning repository https://github.com/shelvacu/fwrf
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shelvacu/fwrf" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshelvacu%2Ffwrf", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshelvacu%2Ffwrf'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b163ddf0aabc0faf66ffde88c9014cc02f763c6d
[INFO] testing shelvacu/fwrf against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshelvacu%2Ffwrf" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shelvacu/fwrf on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shelvacu/fwrf
[INFO] finished tweaking git repo https://github.com/shelvacu/fwrf
[INFO] tweaked toml for git repo https://github.com/shelvacu/fwrf written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/shelvacu/fwrf already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/shelvacu/deranged`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded devtimer v4.0.1
[INFO] [stderr]   Downloaded progressing v3.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd9953cad6acd4fe483af8f23a553a40b5e9e1d16d4def04634c9cd9855e6d08
[INFO] running `Command { std: "docker" "start" "-a" "bd9953cad6acd4fe483af8f23a553a40b5e9e1d16d4def04634c9cd9855e6d08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd9953cad6acd4fe483af8f23a553a40b5e9e1d16d4def04634c9cd9855e6d08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd9953cad6acd4fe483af8f23a553a40b5e9e1d16d4def04634c9cd9855e6d08", kill_on_drop: false }`
[INFO] [stdout] bd9953cad6acd4fe483af8f23a553a40b5e9e1d16d4def04634c9cd9855e6d08
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 69a958a35819c4364022c3c66942947df3ff1f5c9c718e2f779318a5a260cf4a
[INFO] running `Command { std: "docker" "start" "-a" "69a958a35819c4364022c3c66942947df3ff1f5c9c718e2f779318a5a260cf4a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling crossbeam-utils v0.8.7
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling devtimer v4.0.1
[INFO] [stderr]    Compiling deranged v0.2.0 (https://github.com/shelvacu/deranged?branch=array-indexes#db60d169)
[INFO] [stderr]    Compiling progressing v3.0.2
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling crossbeam-channel v0.5.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling fwrf v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(type_ascription, array_zip, min_specialization)]
[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 `fwrf` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "69a958a35819c4364022c3c66942947df3ff1f5c9c718e2f779318a5a260cf4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69a958a35819c4364022c3c66942947df3ff1f5c9c718e2f779318a5a260cf4a", kill_on_drop: false }`
[INFO] [stdout] 69a958a35819c4364022c3c66942947df3ff1f5c9c718e2f779318a5a260cf4a