[INFO] cloning repository https://github.com/dpzmick/synth2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dpzmick/synth2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdpzmick%2Fsynth2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdpzmick%2Fsynth2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 71f80114a2fd5609ceb146615e58eadc77fd100b
[INFO] testing dpzmick/synth2 against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdpzmick%2Fsynth2" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dpzmick/synth2 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dpzmick/synth2
[INFO] finished tweaking git repo https://github.com/dpzmick/synth2
[INFO] tweaked toml for git repo https://github.com/dpzmick/synth2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded shell32-sys v0.1.2
[INFO] [stderr]   Downloaded nix v0.9.0
[INFO] [stderr]   Downloaded easyjack v0.1.2
[INFO] [stderr]   Downloaded ole32-sys v0.2.0
[INFO] [stderr]   Downloaded linefeed v0.2.6
[INFO] [stderr]   Downloaded nix v0.7.0
[INFO] [stderr]   Downloaded ketos_derive v0.10.0
[INFO] [stderr]   Downloaded gumdrop_derive v0.1.0
[INFO] [stderr]   Downloaded jack-sys v0.1.5
[INFO] [stderr]   Downloaded signal v0.4.1
[INFO] [stderr]   Downloaded simd v0.2.4
[INFO] [stderr]   Downloaded gumdrop v0.1.0
[INFO] [stderr]   Downloaded ketos v0.10.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 49fae713d23c8a0a52d79f8dac5b160cff86fe8f420b8ad2f6bca70ddcf8befa
[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" "49fae713d23c8a0a52d79f8dac5b160cff86fe8f420b8ad2f6bca70ddcf8befa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "49fae713d23c8a0a52d79f8dac5b160cff86fe8f420b8ad2f6bca70ddcf8befa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49fae713d23c8a0a52d79f8dac5b160cff86fe8f420b8ad2f6bca70ddcf8befa", kill_on_drop: false }`
[INFO] [stdout] 49fae713d23c8a0a52d79f8dac5b160cff86fe8f420b8ad2f6bca70ddcf8befa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c46a8f6b80d970c00adff3008876c08d8e823b374bf00684863ade154526a47e
[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" "c46a8f6b80d970c00adff3008876c08d8e823b374bf00684863ade154526a47e", kill_on_drop: false }`
[INFO] [stderr]    Compiling simd v0.2.4
[INFO] [stderr]    Compiling easyjack v0.1.2
[INFO] [stderr]    Compiling gumdrop v0.1.0
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling nix v0.9.0
[INFO] [stderr]    Compiling gumdrop_derive v0.1.0
[INFO] [stderr]    Compiling jack-sys v0.1.5
[INFO] [stderr]    Compiling ketos_derive v0.10.0
[INFO] [stderr]    Compiling nix v0.7.0
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr] error: Cannot set `RUSTC_BOOTSTRAP=1` from build script of `simd v0.2.4`.
[INFO] [stderr] note: Crates cannot set `RUSTC_BOOTSTRAP` themselves, as doing so would subvert the stability guarantees of Rust for your project.
[INFO] [stderr] help: If you're sure you want to do this in your project, set the environment variable `RUSTC_BOOTSTRAP=simd` before running cargo instead.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c46a8f6b80d970c00adff3008876c08d8e823b374bf00684863ade154526a47e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c46a8f6b80d970c00adff3008876c08d8e823b374bf00684863ade154526a47e", kill_on_drop: false }`
[INFO] [stdout] c46a8f6b80d970c00adff3008876c08d8e823b374bf00684863ade154526a47e