[INFO] cloning repository https://github.com/proudlygeek/emuchip-8
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/proudlygeek/emuchip-8" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fproudlygeek%2Femuchip-8", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fproudlygeek%2Femuchip-8'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f6e44576998b85f3dc3454fa50b51f03d33b1f1
[INFO] testing proudlygeek/emuchip-8 against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fproudlygeek%2Femuchip-8" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/proudlygeek/emuchip-8 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/proudlygeek/emuchip-8
[INFO] finished tweaking git repo https://github.com/proudlygeek/emuchip-8
[INFO] tweaked toml for git repo https://github.com/proudlygeek/emuchip-8 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/proudlygeek/emuchip-8 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.33
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.33
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.33
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.33
[INFO] [stderr]   Downloaded wbg-rand v0.4.1
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.33
[INFO] [stderr]   Downloaded libc v0.2.47
[INFO] [stderr]   Downloaded rand v0.4.5
[INFO] [stderr]   Downloaded proc-macro2 v0.4.25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] eeb9df6afece9195c97f52e88dcf7b4b0c1958c3d0f219d285c810331b2a9ec8
[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" "eeb9df6afece9195c97f52e88dcf7b4b0c1958c3d0f219d285c810331b2a9ec8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eeb9df6afece9195c97f52e88dcf7b4b0c1958c3d0f219d285c810331b2a9ec8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eeb9df6afece9195c97f52e88dcf7b4b0c1958c3d0f219d285c810331b2a9ec8", kill_on_drop: false }`
[INFO] [stdout] eeb9df6afece9195c97f52e88dcf7b4b0c1958c3d0f219d285c810331b2a9ec8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] c09a748746e7762e3c32349c07d521ff0e2775f7b506118eb13cba7310df87ab
[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" "c09a748746e7762e3c32349c07d521ff0e2775f7b506118eb13cba7310df87ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.25
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.33
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling wasm-bindgen v0.2.33
[INFO] [stderr]    Compiling sdl2-sys v0.32.5
[INFO] [stderr]    Compiling rand v0.6.4
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling rand_os v0.1.1
[INFO] [stderr]    Compiling rand v0.4.5
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling sdl2 v0.32.1
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.33
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.33
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.33
[INFO] [stderr]    Compiling wbg-rand v0.4.1
[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/wbg-rand-0.4.1/src/lib.rs:28:1
[INFO] [stdout]    |
[INFO] [stdout] 28 | #![feature(use_extern_macros)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `use_extern_macros` has been stable since 1.30.0 and no longer requires an attribute to enable
[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 `wbg-rand` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "c09a748746e7762e3c32349c07d521ff0e2775f7b506118eb13cba7310df87ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c09a748746e7762e3c32349c07d521ff0e2775f7b506118eb13cba7310df87ab", kill_on_drop: false }`
[INFO] [stdout] c09a748746e7762e3c32349c07d521ff0e2775f7b506118eb13cba7310df87ab