[INFO] cloning repository https://github.com/Tomboyo/rust-rocks
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Tomboyo/rust-rocks" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTomboyo%2Frust-rocks", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTomboyo%2Frust-rocks'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c34a6a76b61c575c1ee02f1c5fb227bc9776bc91
[INFO] testing Tomboyo/rust-rocks against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTomboyo%2Frust-rocks" "/workspace/builds/worker-25/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-25/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Tomboyo/rust-rocks 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] removed /workspace/builds/worker-25/source/.cargo/config
[INFO] started tweaking git repo https://github.com/Tomboyo/rust-rocks
[INFO] finished tweaking git repo https://github.com/Tomboyo/rust-rocks
[INFO] tweaked toml for git repo https://github.com/Tomboyo/rust-rocks written to /workspace/builds/worker-25/source/Cargo.toml
[INFO] crate git repo https://github.com/Tomboyo/rust-rocks 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] 68172f745829a5e0161b637f793326ceac2e9c39bd634e7fe6206644b3d89d99
[INFO] running `Command { std: "docker" "start" "-a" "68172f745829a5e0161b637f793326ceac2e9c39bd634e7fe6206644b3d89d99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "68172f745829a5e0161b637f793326ceac2e9c39bd634e7fe6206644b3d89d99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68172f745829a5e0161b637f793326ceac2e9c39bd634e7fe6206644b3d89d99", kill_on_drop: false }`
[INFO] [stdout] 68172f745829a5e0161b637f793326ceac2e9c39bd634e7fe6206644b3d89d99
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] 13521bf0c51dd7255a602c98b70d8affd0e8792725f558d9e1fd23e06a8af1e2
[INFO] running `Command { std: "docker" "start" "-a" "13521bf0c51dd7255a602c98b70d8affd0e8792725f558d9e1fd23e06a8af1e2", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling xml-rs v0.8.3
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling sdl2 v0.34.5
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling atomic_refcell v0.1.7
[INFO] [stderr]    Compiling scoped-tls-hkt v0.1.2
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling instant v0.1.9
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling jpeg-decoder v0.1.22
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling sdl2-sys v0.34.5
[INFO] [stderr]    Compiling tiff v0.6.1
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling env_logger v0.8.3
[INFO] [stderr]    Compiling gl_generator v0.13.1
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling cmake v0.1.45
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling image v0.23.14
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling gl v0.13.0
[INFO] [stderr]    Compiling freetype-sys v0.14.0
[INFO] [stderr]    Compiling freetype-rs v0.28.0
[INFO] [stderr]    Compiling piston2d-opengl_graphics v0.78.0
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling legion_codegen v0.4.0
[INFO] [stderr]    Compiling pistoncore-input v1.0.0
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling erased-serde v0.3.13
[INFO] [stderr]    Compiling legion v0.4.0
[INFO] [stderr]    Compiling pistoncore-window v0.47.0
[INFO] [stderr]    Compiling pistoncore-event_loop v0.53.0
[INFO] [stderr]    Compiling pistoncore-sdl2_window v0.67.0
[INFO] [stderr]    Compiling piston v0.53.0
[INFO] [stderr]    Compiling rust-rocks 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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iter_intersperse)]
[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 `rust-rocks` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "13521bf0c51dd7255a602c98b70d8affd0e8792725f558d9e1fd23e06a8af1e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13521bf0c51dd7255a602c98b70d8affd0e8792725f558d9e1fd23e06a8af1e2", kill_on_drop: false }`
[INFO] [stdout] 13521bf0c51dd7255a602c98b70d8affd0e8792725f558d9e1fd23e06a8af1e2