[INFO] cloning repository https://github.com/davidbarsky/vis-diff
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/davidbarsky/vis-diff" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidbarsky%2Fvis-diff", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidbarsky%2Fvis-diff'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a4122c30a5cbc2f2c5cd87d774b834a3ea10a69a
[INFO] checking davidbarsky/vis-diff against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidbarsky%2Fvis-diff" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/davidbarsky/vis-diff on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/davidbarsky/vis-diff
[INFO] finished tweaking git repo https://github.com/davidbarsky/vis-diff
[INFO] tweaked toml for git repo https://github.com/davidbarsky/vis-diff written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/davidbarsky/vis-diff already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "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] 00f7fd6aed7dd438dcd4bd336ec2ec2a03078a9269ce7e011cad473c0c154092
[INFO] running `Command { std: "docker" "start" "-a" "00f7fd6aed7dd438dcd4bd336ec2ec2a03078a9269ce7e011cad473c0c154092", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00f7fd6aed7dd438dcd4bd336ec2ec2a03078a9269ce7e011cad473c0c154092", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00f7fd6aed7dd438dcd4bd336ec2ec2a03078a9269ce7e011cad473c0c154092", kill_on_drop: false }`
[INFO] [stdout] 00f7fd6aed7dd438dcd4bd336ec2ec2a03078a9269ce7e011cad473c0c154092
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0df5cd36b4159d6d9a4a223ea8f6f49417c9f9f329d1caaf6da38f302a96a474
[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" "0df5cd36b4159d6d9a4a223ea8f6f49417c9f9f329d1caaf6da38f302a96a474", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking libc v0.2.34
[INFO] [stderr]    Compiling cc v1.0.3
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]     Checking ansi_term v0.10.2
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking rustc-demangle v0.1.5
[INFO] [stderr]     Checking vec_map v0.8.0
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]     Checking difference v1.0.0
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling structopt-derive v0.1.6
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]     Checking atty v0.2.3
[INFO] [stderr]     Checking clap v2.29.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]     Checking structopt v0.1.6
[INFO] [stderr]     Checking backtrace v0.3.4
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking vis-diff v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable call
[INFO] [stdout]   --> src/main.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | #[derive(StructOpt, Debug)]
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          unreachable call
[INFO] [stdout]    |          any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable call
[INFO] [stdout]   --> src/main.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | #[derive(StructOpt, Debug)]
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          unreachable call
[INFO] [stdout]    |          any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable call
[INFO] [stdout]   --> src/main.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | #[derive(StructOpt, Debug)]
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          unreachable call
[INFO] [stdout]    |          any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable call
[INFO] [stdout]   --> src/main.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | #[derive(StructOpt, Debug)]
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          unreachable call
[INFO] [stdout]    |          any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.45s
[INFO] running `Command { std: "docker" "inspect" "0df5cd36b4159d6d9a4a223ea8f6f49417c9f9f329d1caaf6da38f302a96a474", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0df5cd36b4159d6d9a4a223ea8f6f49417c9f9f329d1caaf6da38f302a96a474", kill_on_drop: false }`
[INFO] [stdout] 0df5cd36b4159d6d9a4a223ea8f6f49417c9f9f329d1caaf6da38f302a96a474