[INFO] fetching crate difftastic-oc 0.23.0...
[INFO] checking difftastic-oc-0.23.0 against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1
[INFO] extracting crate difftastic-oc 0.23.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate difftastic-oc 0.23.0
[INFO] finished tweaking crates.io crate difftastic-oc 0.23.0
[INFO] tweaked toml for crates.io crate difftastic-oc 0.23.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate difftastic-oc 0.23.0 on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate difftastic-oc 0.23.0 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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b14b0a7424331c3e46fe31a33a52240b36d9472732dae41bb0b072e76560318b
[INFO] running `Command { std: "docker" "start" "-a" "b14b0a7424331c3e46fe31a33a52240b36d9472732dae41bb0b072e76560318b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b14b0a7424331c3e46fe31a33a52240b36d9472732dae41bb0b072e76560318b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b14b0a7424331c3e46fe31a33a52240b36d9472732dae41bb0b072e76560318b", kill_on_drop: false }`
[INFO] [stdout] b14b0a7424331c3e46fe31a33a52240b36d9472732dae41bb0b072e76560318b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4991c8c30279230677231e4d04fb2d5c479f3f5f2ff7b2d9177d3548cb33d7d
[INFO] running `Command { std: "docker" "start" "-a" "b4991c8c30279230677231e4d04fb2d5c479f3f5f2ff7b2d9177d3548cb33d7d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling crossbeam-utils v0.8.7
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling quote v1.0.13
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling syn v1.0.84
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling libmimalloc-sys v0.1.23
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]    Compiling tree-sitter v0.20.5
[INFO] [stderr]     Checking archery v0.4.0
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]     Checking wu-diff v0.1.2
[INFO] [stderr]     Checking rpds v0.11.0
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking radix-heap v0.4.2
[INFO] [stderr]     Checking diff v0.1.12
[INFO] [stderr]     Checking owo-colors v3.2.0
[INFO] [stderr]     Checking typed-arena v2.0.1
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling const_format_proc_macros v0.2.22
[INFO] [stderr]     Checking pretty_assertions v1.0.0
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking term_size v0.3.2
[INFO] [stderr]     Checking clap v3.0.13
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking const_format v0.2.22
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]     Checking mimalloc v0.1.27
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling difftastic-oc v0.23.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde v1.0.136
[INFO] [stderr]     Checking serde_json v1.0.79
[INFO] [stdout] warning: struct `LinePosition` is never constructed
[INFO] [stdout]   --> src/lines.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct LinePosition {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/guess_language.rs:85:63
[INFO] [stdout]    |
[INFO] [stdout] 85 |         let lang = match mode_name.to_ascii_lowercase().trim().borrow() {
[INFO] [stdout]    |                                                               ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Borrow`, so calling `borrow` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinePosition` is never constructed
[INFO] [stdout]   --> src/lines.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct LinePosition {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/guess_language.rs:85:63
[INFO] [stdout]    |
[INFO] [stdout] 85 |         let lang = match mode_name.to_ascii_lowercase().trim().borrow() {
[INFO] [stdout]    |                                                               ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Borrow`, so calling `borrow` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 27.10s
[INFO] running `Command { std: "docker" "inspect" "b4991c8c30279230677231e4d04fb2d5c479f3f5f2ff7b2d9177d3548cb33d7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4991c8c30279230677231e4d04fb2d5c479f3f5f2ff7b2d9177d3548cb33d7d", kill_on_drop: false }`
[INFO] [stdout] b4991c8c30279230677231e4d04fb2d5c479f3f5f2ff7b2d9177d3548cb33d7d