[INFO] cloning repository https://github.com/Synthetica9/rs-tance
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Synthetica9/rs-tance" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSynthetica9%2Frs-tance", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSynthetica9%2Frs-tance'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f0d2a9558f29e26015e2516ef65e6667437c589d
[INFO] checking Synthetica9/rs-tance against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSynthetica9%2Frs-tance" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Synthetica9/rs-tance on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Synthetica9/rs-tance
[INFO] finished tweaking git repo https://github.com/Synthetica9/rs-tance
[INFO] tweaked toml for git repo https://github.com/Synthetica9/rs-tance written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/Synthetica9/rs-tance already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded constant_time_eq v0.1.3
[INFO] [stderr]   Downloaded blake2-rfc v0.2.18
[INFO] [stderr]   Downloaded bitflags v1.1.0
[INFO] [stderr]   Downloaded quote v0.6.12
[INFO] [stderr]   Downloaded syn v0.15.34
[INFO] [stderr]   Downloaded backtrace v0.3.30
[INFO] [stderr]   Downloaded redox_users v0.3.0
[INFO] [stderr]   Downloaded lazy_static v1.3.0
[INFO] [stderr]   Downloaded autocfg v0.1.4
[INFO] [stderr]   Downloaded ctrlc v3.1.3
[INFO] [stderr]   Downloaded argon2rs v0.2.5
[INFO] [stderr]   Downloaded winapi v0.3.7
[INFO] [stderr]   Downloaded rustc-demangle v0.1.15
[INFO] [stderr]   Downloaded libc v0.2.58
[INFO] [stderr]   Downloaded rand_core v0.4.0
[INFO] [stderr]   Downloaded redox_syscall v0.1.54
[INFO] [stderr]   Downloaded primes v0.2.3
[INFO] [stderr]   Downloaded cc v1.0.37
[INFO] [stderr]   Downloaded nix v0.14.0
[INFO] [stderr]   Downloaded rug v1.4.0
[INFO] [stderr]   Downloaded gmp-mpfr-sys v1.1.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 55b04479c71e907155dcb1041871b2b3b9123c2738d3141b2e0d4b4329cc95c0
[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" "55b04479c71e907155dcb1041871b2b3b9123c2738d3141b2e0d4b4329cc95c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "55b04479c71e907155dcb1041871b2b3b9123c2738d3141b2e0d4b4329cc95c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55b04479c71e907155dcb1041871b2b3b9123c2738d3141b2e0d4b4329cc95c0", kill_on_drop: false }`
[INFO] [stdout] 55b04479c71e907155dcb1041871b2b3b9123c2738d3141b2e0d4b4329cc95c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 50c8e494e8a6a9cbbfb5164a2dc306551eb0350995f732520519de5dc43cef2a
[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" "50c8e494e8a6a9cbbfb5164a2dc306551eb0350995f732520519de5dc43cef2a", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling nix v0.14.0
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling rug v1.4.0
[INFO] [stderr]     Checking primes v0.2.3
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.1.13
[INFO] [stderr]     Checking ctrlc v3.1.3
[INFO] [stderr]     Checking rs-tance v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5m 03s
[INFO] running `Command { std: "docker" "inspect" "50c8e494e8a6a9cbbfb5164a2dc306551eb0350995f732520519de5dc43cef2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50c8e494e8a6a9cbbfb5164a2dc306551eb0350995f732520519de5dc43cef2a", kill_on_drop: false }`
[INFO] [stdout] 50c8e494e8a6a9cbbfb5164a2dc306551eb0350995f732520519de5dc43cef2a