[INFO] cloning repository https://github.com/veer66/zstd_writer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/veer66/zstd_writer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fveer66%2Fzstd_writer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fveer66%2Fzstd_writer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8734ce1b7c35f153329d414d179c75a423fa1aa5
[INFO] checking veer66/zstd_writer against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fveer66%2Fzstd_writer" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/veer66/zstd_writer on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/veer66/zstd_writer
[INFO] finished tweaking git repo https://github.com/veer66/zstd_writer
[INFO] tweaked toml for git repo https://github.com/veer66/zstd_writer written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/veer66/zstd_writer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: version requirement `0.6.0+zstd.1.4.8` for dependency `zstd` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded zstd v0.6.0+zstd.1.4.8
[INFO] [stderr]   Downloaded zstd-safe v3.0.0+zstd.1.4.8
[INFO] [stderr]   Downloaded zstd-sys v1.4.19+zstd.1.4.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bfcb4483b059627eafb0a8f2582cefd2d70311be76c5c91123b60e4fc2b922e0
[INFO] running `Command { std: "docker" "start" "-a" "bfcb4483b059627eafb0a8f2582cefd2d70311be76c5c91123b60e4fc2b922e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bfcb4483b059627eafb0a8f2582cefd2d70311be76c5c91123b60e4fc2b922e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfcb4483b059627eafb0a8f2582cefd2d70311be76c5c91123b60e4fc2b922e0", kill_on_drop: false }`
[INFO] [stdout] bfcb4483b059627eafb0a8f2582cefd2d70311be76c5c91123b60e4fc2b922e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9a7043121e7ce74f1a2d9dfafc9d154139d1c6aad4f716790a2d316fd91768cf
[INFO] running `Command { std: "docker" "start" "-a" "9a7043121e7ce74f1a2d9dfafc9d154139d1c6aad4f716790a2d316fd91768cf", kill_on_drop: false }`
[INFO] [stderr] warning: version requirement `0.6.0+zstd.1.4.8` for dependency `zstd` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.85
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling zstd-safe v3.0.0+zstd.1.4.8
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling zstd-sys v1.4.19+zstd.1.4.8
[INFO] [stderr]     Checking zstd v0.6.0+zstd.1.4.8
[INFO] [stderr]     Checking zstd_writer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 37s
[INFO] running `Command { std: "docker" "inspect" "9a7043121e7ce74f1a2d9dfafc9d154139d1c6aad4f716790a2d316fd91768cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a7043121e7ce74f1a2d9dfafc9d154139d1c6aad4f716790a2d316fd91768cf", kill_on_drop: false }`
[INFO] [stdout] 9a7043121e7ce74f1a2d9dfafc9d154139d1c6aad4f716790a2d316fd91768cf