[INFO] cloning repository https://github.com/yomaytk/ruscaml
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yomaytk/ruscaml" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyomaytk%2Fruscaml", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyomaytk%2Fruscaml'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ab784455398e398d5117f417e1f21ee348f5b6b8
[INFO] checking yomaytk/ruscaml against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyomaytk%2Fruscaml" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yomaytk/ruscaml on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yomaytk/ruscaml
[INFO] finished tweaking git repo https://github.com/yomaytk/ruscaml
[INFO] tweaked toml for git repo https://github.com/yomaytk/ruscaml written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/yomaytk/ruscaml already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0fedd39c890bf37f4872079ee496e8151e28a1f8fb3ae3974543df21d1608e58
[INFO] running `Command { std: "docker" "start" "-a" "0fedd39c890bf37f4872079ee496e8151e28a1f8fb3ae3974543df21d1608e58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0fedd39c890bf37f4872079ee496e8151e28a1f8fb3ae3974543df21d1608e58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fedd39c890bf37f4872079ee496e8151e28a1f8fb3ae3974543df21d1608e58", kill_on_drop: false }`
[INFO] [stdout] 0fedd39c890bf37f4872079ee496e8151e28a1f8fb3ae3974543df21d1608e58
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97712b90ef9e30679f3e773f990dd26ebf4734c7813c5e88ef5fa707c7b2cdeb
[INFO] running `Command { std: "docker" "start" "-a" "97712b90ef9e30679f3e773f990dd26ebf4734c7813c5e88ef5fa707c7b2cdeb", kill_on_drop: false }`
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking ruscaml v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/lib.rs:100:25
[INFO] [stdout]     |
[INFO] [stdout] 99  |                         panic!("{:?}", &self);
[INFO] [stdout]     |                         --------------------- any code following this expression is unreachable
[INFO] [stdout] 100 |                         return None;
[INFO] [stdout]     |                         ^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/lib.rs:100:25
[INFO] [stdout]     |
[INFO] [stdout] 99  |                         panic!("{:?}", &self);
[INFO] [stdout]     |                         --------------------- any code following this expression is unreachable
[INFO] [stdout] 100 |                         return None;
[INFO] [stdout]     |                         ^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "97712b90ef9e30679f3e773f990dd26ebf4734c7813c5e88ef5fa707c7b2cdeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97712b90ef9e30679f3e773f990dd26ebf4734c7813c5e88ef5fa707c7b2cdeb", kill_on_drop: false }`
[INFO] [stdout] 97712b90ef9e30679f3e773f990dd26ebf4734c7813c5e88ef5fa707c7b2cdeb