[INFO] cloning repository https://github.com/ckatzer4/mbox-prime
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ckatzer4/mbox-prime" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fckatzer4%2Fmbox-prime", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fckatzer4%2Fmbox-prime'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 691558e69a97eedb603f32fd069cbc7d148fe49d
[INFO] checking ckatzer4/mbox-prime against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fckatzer4%2Fmbox-prime" "/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/ckatzer4/mbox-prime on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ckatzer4/mbox-prime
[INFO] finished tweaking git repo https://github.com/ckatzer4/mbox-prime
[INFO] tweaked toml for git repo https://github.com/ckatzer4/mbox-prime written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ckatzer4/mbox-prime already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "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] 5ba4e5fde4084a14f861613669589e0163d343b4e8af34d8a8bd3886e25e0bfc
[INFO] running `Command { std: "docker" "start" "-a" "5ba4e5fde4084a14f861613669589e0163d343b4e8af34d8a8bd3886e25e0bfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ba4e5fde4084a14f861613669589e0163d343b4e8af34d8a8bd3886e25e0bfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ba4e5fde4084a14f861613669589e0163d343b4e8af34d8a8bd3886e25e0bfc", kill_on_drop: false }`
[INFO] [stdout] 5ba4e5fde4084a14f861613669589e0163d343b4e8af34d8a8bd3886e25e0bfc
[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=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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "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] 840f8d3f88449edc9ecb969c06b958f855c6305fe3abfe7620711ecf91e83eb5
[INFO] running `Command { std: "docker" "start" "-a" "840f8d3f88449edc9ecb969c06b958f855c6305fe3abfe7620711ecf91e83eb5", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.42
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]     Checking byteorder v1.2.3
[INFO] [stderr]     Checking bitflags v1.0.3
[INFO] [stderr]     Checking cassowary v0.3.0
[INFO] [stderr]     Checking log v0.4.3
[INFO] [stderr]     Checking base64 v0.9.2
[INFO] [stderr]    Compiling email v0.0.19 (https://github.com/ckatzer4/rust-email?rev=44a76b984c27f588be36c9cb69fa18310934c083#44a76b98)
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stderr]     Checking memmap v0.5.2
[INFO] [stderr]     Checking mbox-reader v0.1.0
[INFO] [stderr]     Checking tui v0.2.3
[INFO] [stderr]     Checking num-integer v0.1.39
[INFO] [stderr]     Checking chrono v0.4.4
[INFO] [stderr]     Checking mbox-prime v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.93s
[INFO] running `Command { std: "docker" "inspect" "840f8d3f88449edc9ecb969c06b958f855c6305fe3abfe7620711ecf91e83eb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "840f8d3f88449edc9ecb969c06b958f855c6305fe3abfe7620711ecf91e83eb5", kill_on_drop: false }`
[INFO] [stdout] 840f8d3f88449edc9ecb969c06b958f855c6305fe3abfe7620711ecf91e83eb5