[INFO] updating cached repository https://github.com/leo60228/chip8-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 63593ae56dfb617fa4e885e9b8cda7d7a21f8e49
[INFO] testing leo60228/chip8-rs against 1.45.2 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleo60228%2Fchip8-rs" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/leo60228/chip8-rs on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/leo60228/chip8-rs
[INFO] finished tweaking git repo https://github.com/leo60228/chip8-rs
[INFO] tweaked toml for git repo https://github.com/leo60228/chip8-rs written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/leo60228/chip8-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 67e0b3f71a03973f539e4bf299feb411540b103a8631379a42b6efb091eb870d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "67e0b3f71a03973f539e4bf299feb411540b103a8631379a42b6efb091eb870d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67e0b3f71a03973f539e4bf299feb411540b103a8631379a42b6efb091eb870d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67e0b3f71a03973f539e4bf299feb411540b103a8631379a42b6efb091eb870d", kill_on_drop: false }`
[INFO] [stdout] 67e0b3f71a03973f539e4bf299feb411540b103a8631379a42b6efb091eb870d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ba91ffc5f14daa87369e297c8f032cbf13f54307a678c58bc9217fea8304523
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9ba91ffc5f14daa87369e297c8f032cbf13f54307a678c58bc9217fea8304523", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling pkg-config v0.3.15
[INFO] [stderr]    Compiling libm v0.1.4
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling rawpointer v0.1.0
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling regex-syntax v0.6.11
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling array-macro v1.0.4
[INFO] [stderr]    Compiling static_assertions v0.3.3
[INFO] [stderr]    Compiling claxon v0.4.2
[INFO] [stderr]    Compiling hound v3.4.0
[INFO] [stderr]    Compiling bitvec v0.14.0
[INFO] [stderr]    Compiling bcd v0.1.0
[INFO] [stderr]    Compiling minimp3-sys v0.3.1
[INFO] [stderr]    Compiling minifb v0.11.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/bcd-0.1.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test, const_fn, const_let, try_from)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling nom v5.0.0
[INFO] [stderr]    Compiling matrixmultiply v0.2.2
[INFO] [stderr]    Compiling enum-map-internals v0.2.0
[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 `bcd`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "9ba91ffc5f14daa87369e297c8f032cbf13f54307a678c58bc9217fea8304523", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ba91ffc5f14daa87369e297c8f032cbf13f54307a678c58bc9217fea8304523", kill_on_drop: false }`
[INFO] [stdout] 9ba91ffc5f14daa87369e297c8f032cbf13f54307a678c58bc9217fea8304523