[INFO] cloning repository https://github.com/eliassjogreen/twinprime
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/eliassjogreen/twinprime" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feliassjogreen%2Ftwinprime", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feliassjogreen%2Ftwinprime'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 073824a6351add07ee2eb45115a6769e0ea0ef7e
[INFO] testing eliassjogreen/twinprime against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feliassjogreen%2Ftwinprime" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/eliassjogreen/twinprime 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/eliassjogreen/twinprime
[INFO] finished tweaking git repo https://github.com/eliassjogreen/twinprime
[INFO] tweaked toml for git repo https://github.com/eliassjogreen/twinprime written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/eliassjogreen/twinprime 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 cargo_gn v0.0.15
[INFO] [stderr]   Downloaded fslock v0.1.6
[INFO] [stderr]   Downloaded deno_core v0.77.0
[INFO] [stderr]   Downloaded fast-modulo v0.2.0
[INFO] [stderr]   Downloaded is-prime-for-primitive-int v0.3.1
[INFO] [stderr]   Downloaded rusty_v8 v0.16.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] b072d5067525c144fe8d5420621ca333f854b281f37cb9f91ac5c26c98fb1a25
[INFO] running `Command { std: "docker" "start" "-a" "b072d5067525c144fe8d5420621ca333f854b281f37cb9f91ac5c26c98fb1a25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b072d5067525c144fe8d5420621ca333f854b281f37cb9f91ac5c26c98fb1a25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b072d5067525c144fe8d5420621ca333f854b281f37cb9f91ac5c26c98fb1a25", kill_on_drop: false }`
[INFO] [stdout] b072d5067525c144fe8d5420621ca333f854b281f37cb9f91ac5c26c98fb1a25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 2677b0948cf1d762d4e5330e5b3b07ec6d78f9187e57b6005897a38877f6f5ac
[INFO] running `Command { std: "docker" "start" "-a" "2677b0948cf1d762d4e5330e5b3b07ec6d78f9187e57b6005897a38877f6f5ac", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling once_cell v1.4.1
[INFO] [stderr]    Compiling futures-sink v0.3.12
[INFO] [stderr]    Compiling futures-core v0.3.12
[INFO] [stderr]    Compiling cargo_gn v0.0.15
[INFO] [stderr]    Compiling futures-io v0.3.12
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling log v0.4.13
[INFO] [stderr]    Compiling fast-modulo v0.2.0
[INFO] [stderr]    Compiling form_urlencoded v1.0.0
[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/fast-modulo-0.2.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(asm)]
[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 `fast-modulo` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2677b0948cf1d762d4e5330e5b3b07ec6d78f9187e57b6005897a38877f6f5ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2677b0948cf1d762d4e5330e5b3b07ec6d78f9187e57b6005897a38877f6f5ac", kill_on_drop: false }`
[INFO] [stdout] 2677b0948cf1d762d4e5330e5b3b07ec6d78f9187e57b6005897a38877f6f5ac