[INFO] cloning repository https://github.com/hwrdtm/log-file-analyser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hwrdtm/log-file-analyser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhwrdtm%2Flog-file-analyser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhwrdtm%2Flog-file-analyser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b1195ff6942062393bceb7e57ff971c54e908dcf
[INFO] checking hwrdtm/log-file-analyser against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhwrdtm%2Flog-file-analyser" "/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/hwrdtm/log-file-analyser on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hwrdtm/log-file-analyser
[INFO] removed 1 missing examples
[INFO] finished tweaking git repo https://github.com/hwrdtm/log-file-analyser
[INFO] tweaked toml for git repo https://github.com/hwrdtm/log-file-analyser written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/hwrdtm/log-file-analyser 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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: merge_and_print
[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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc0fc3c5e1b17ba627fcc8193d153c05afa29ede6e50b30e1a06503d535c1fad
[INFO] running `Command { std: "docker" "start" "-a" "cc0fc3c5e1b17ba627fcc8193d153c05afa29ede6e50b30e1a06503d535c1fad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc0fc3c5e1b17ba627fcc8193d153c05afa29ede6e50b30e1a06503d535c1fad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc0fc3c5e1b17ba627fcc8193d153c05afa29ede6e50b30e1a06503d535c1fad", kill_on_drop: false }`
[INFO] [stdout] cc0fc3c5e1b17ba627fcc8193d153c05afa29ede6e50b30e1a06503d535c1fad
[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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 923c7b3adb9a5ab012d0304e6ab02d29be06c12d5a4a41d3e2520099b95efa7e
[INFO] running `Command { std: "docker" "start" "-a" "923c7b3adb9a5ab012d0304e6ab02d29be06c12d5a4a41d3e2520099b95efa7e", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: merge_and_print
[INFO] [stderr]     Checking log-file-analyser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `collect` that must be used
[INFO] [stdout]   --> examples/merge_and_print/main.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     iter.collect::<Vec<_>>();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let _ = iter.collect::<Vec<_>>();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "923c7b3adb9a5ab012d0304e6ab02d29be06c12d5a4a41d3e2520099b95efa7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "923c7b3adb9a5ab012d0304e6ab02d29be06c12d5a4a41d3e2520099b95efa7e", kill_on_drop: false }`
[INFO] [stdout] 923c7b3adb9a5ab012d0304e6ab02d29be06c12d5a4a41d3e2520099b95efa7e