[INFO] fetching crate lox-scanner 0.1.0...
[INFO] checking lox-scanner-0.1.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate lox-scanner 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate lox-scanner 0.1.0 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lox-scanner 0.1.0
[INFO] finished tweaking crates.io crate lox-scanner 0.1.0
[INFO] tweaked toml for crates.io crate lox-scanner 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate lox-scanner 0.1.0 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 718326e1637cef701b4b0e75fc5a2d85f0729ef08c4d06745ddc78454575ecc3
[INFO] running `Command { std: "docker" "start" "-a" "718326e1637cef701b4b0e75fc5a2d85f0729ef08c4d06745ddc78454575ecc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "718326e1637cef701b4b0e75fc5a2d85f0729ef08c4d06745ddc78454575ecc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "718326e1637cef701b4b0e75fc5a2d85f0729ef08c4d06745ddc78454575ecc3", kill_on_drop: false }`
[INFO] [stdout] 718326e1637cef701b4b0e75fc5a2d85f0729ef08c4d06745ddc78454575ecc3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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 -Dtail_expr_drop_order" "-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3af3f425a77afd1b56797326ea813d2f9e173c57c7aadfff1dd49163489d98e5
[INFO] running `Command { std: "docker" "start" "-a" "3af3f425a77afd1b56797326ea813d2f9e173c57c7aadfff1dd49163489d98e5", kill_on_drop: false }`
[INFO] [stderr]     Checking peekmore v1.0.0
[INFO] [stderr]     Checking lox-scanner v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `peek_ahead` is never used
[INFO] [stdout]   --> src/source_iterator.rs:38:19
[INFO] [stdout]    |
[INFO] [stdout] 12 | / impl<T> SourceIterator<T>
[INFO] [stdout] 13 | |     where
[INFO] [stdout] 14 | |         T: Iterator<Item=char>,
[INFO] [stdout]    | |_______________________________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 38 |       pub(crate) fn peek_ahead(&mut self) -> Option<&char> {
[INFO] [stdout]    |                     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `peek_ahead` is never used
[INFO] [stdout]   --> src/source_iterator.rs:38:19
[INFO] [stdout]    |
[INFO] [stdout] 12 | / impl<T> SourceIterator<T>
[INFO] [stdout] 13 | |     where
[INFO] [stdout] 14 | |         T: Iterator<Item=char>,
[INFO] [stdout]    | |_______________________________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 38 |       pub(crate) fn peek_ahead(&mut self) -> Option<&char> {
[INFO] [stdout]    |                     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "3af3f425a77afd1b56797326ea813d2f9e173c57c7aadfff1dd49163489d98e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3af3f425a77afd1b56797326ea813d2f9e173c57c7aadfff1dd49163489d98e5", kill_on_drop: false }`
[INFO] [stdout] 3af3f425a77afd1b56797326ea813d2f9e173c57c7aadfff1dd49163489d98e5