[INFO] cloning repository https://github.com/algon-320/toyterm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/algon-320/toyterm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falgon-320%2Ftoyterm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falgon-320%2Ftoyterm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a2844a79c059c9f22a94ea5f734a8aa52ba9cc4c
[INFO] testing algon-320/toyterm against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falgon-320%2Ftoyterm" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/algon-320/toyterm on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/algon-320/toyterm
[INFO] finished tweaking git repo https://github.com/algon-320/toyterm
[INFO] tweaked toml for git repo https://github.com/algon-320/toyterm written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/algon-320/toyterm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 80bbf28403662bfc3c63f93357d904e0a3b64d8cc5f4f83e1a3b6ed059eb3000
[INFO] running `Command { std: "docker" "start" "-a" "80bbf28403662bfc3c63f93357d904e0a3b64d8cc5f4f83e1a3b6ed059eb3000", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80bbf28403662bfc3c63f93357d904e0a3b64d8cc5f4f83e1a3b6ed059eb3000", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80bbf28403662bfc3c63f93357d904e0a3b64d8cc5f4f83e1a3b6ed059eb3000", kill_on_drop: false }`
[INFO] [stdout] 80bbf28403662bfc3c63f93357d904e0a3b64d8cc5f4f83e1a3b6ed059eb3000
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bdc5c38653d3134485e9f95c0fab8ecd86feb4e572601f1d54c53fb221151352
[INFO] running `Command { std: "docker" "start" "-a" "bdc5c38653d3134485e9f95c0fab8ecd86feb4e572601f1d54c53fb221151352", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.87
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling lexical-core v0.7.5
[INFO] [stderr]    Compiling serde v0.8.23
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling const-cstr v0.3.0
[INFO] [stderr]    Compiling sdl2 v0.34.3
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling rust-ini v0.13.0
[INFO] [stderr]    Compiling ucd v0.1.1
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling thread_local v1.1.3
[INFO] [stderr]    Compiling yeslogic-fontconfig-sys v2.11.1
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling yaml-rust v0.4.5
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling num-complex v0.4.0
[INFO] [stderr]    Compiling sdl2-sys v0.34.3
[INFO] [stderr]    Compiling regex v1.4.3
[INFO] [stderr]    Compiling sixel v0.1.0 (/opt/rustwide/workdir/sixel)
[INFO] [stderr]    Compiling num v0.4.0
[INFO] [stderr]    Compiling serde_test v0.8.23
[INFO] [stderr]    Compiling linked-hash-map v0.3.0
[INFO] [stderr]    Compiling serde-hjson v0.9.1
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling nix v0.20.0
[INFO] [stderr]    Compiling env_logger v0.8.3
[INFO] [stderr]    Compiling fontconfig v0.2.0
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling config v0.10.1
[INFO] [stderr]    Compiling toyterm v0.1.0 (/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(step_trait)]
[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 `toyterm` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "bdc5c38653d3134485e9f95c0fab8ecd86feb4e572601f1d54c53fb221151352", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdc5c38653d3134485e9f95c0fab8ecd86feb4e572601f1d54c53fb221151352", kill_on_drop: false }`
[INFO] [stdout] bdc5c38653d3134485e9f95c0fab8ecd86feb4e572601f1d54c53fb221151352