[INFO] cloning repository https://github.com/ngynkvn/differs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ngynkvn/differs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fngynkvn%2Fdiffers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fngynkvn%2Fdiffers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 37eaa53a5b83e0e37aeca4bd521c78ebf28851db
[INFO] checking ngynkvn/differs against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fngynkvn%2Fdiffers" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ngynkvn/differs on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ngynkvn/differs
[INFO] finished tweaking git repo https://github.com/ngynkvn/differs
[INFO] tweaked toml for git repo https://github.com/ngynkvn/differs written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ngynkvn/differs 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.77
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.77
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.27
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.77
[INFO] [stderr]   Downloaded yew-macro v0.18.0
[INFO] [stderr]   Downloaded dissimilar v1.0.2
[INFO] [stderr]   Downloaded js-sys v0.3.54
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.77
[INFO] [stderr]   Downloaded git2 v0.13.22
[INFO] [stderr]   Downloaded libssh2-sys v0.2.21
[INFO] [stderr]   Downloaded web-sys v0.3.54
[INFO] [stderr]   Downloaded yew v0.18.0
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.77
[INFO] [stderr]   Downloaded libgit2-sys v0.12.23+1.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 177041c3974d19e3fb8834a8fcd94d4144373607c3cf67597b8863827b115815
[INFO] running `Command { std: "docker" "start" "-a" "177041c3974d19e3fb8834a8fcd94d4144373607c3cf67597b8863827b115815", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "177041c3974d19e3fb8834a8fcd94d4144373607c3cf67597b8863827b115815", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "177041c3974d19e3fb8834a8fcd94d4144373607c3cf67597b8863827b115815", kill_on_drop: false }`
[INFO] [stdout] 177041c3974d19e3fb8834a8fcd94d4144373607c3cf67597b8863827b115815
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f2d7150b8afed435f31990b36981ec24072a7733249653359c415cdbf478cd5
[INFO] running `Command { std: "docker" "start" "-a" "4f2d7150b8afed435f31990b36981ec24072a7733249653359c415cdbf478cd5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.77
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling bumpalo v3.7.0
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling wasm-bindgen v0.2.77
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking tinyvec v1.3.1
[INFO] [stderr]    Compiling anyhow v1.0.43
[INFO] [stderr]     Checking unicode-bidi v0.3.6
[INFO] [stderr]    Compiling serde_json v1.0.67
[INFO] [stderr]    Compiling boolinator v2.4.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling yew v0.18.0
[INFO] [stderr]     Checking http v0.2.4
[INFO] [stderr]     Checking cfg-match v0.2.1
[INFO] [stderr]     Checking anymap v0.12.1
[INFO] [stderr]     Checking slab v0.4.4
[INFO] [stderr]     Checking dissimilar v1.0.2
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]    Compiling openssl-sys v0.9.66
[INFO] [stderr]    Compiling libssh2-sys v0.2.21
[INFO] [stderr]    Compiling libgit2-sys v0.12.23+1.2.0
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.77
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.77
[INFO] [stderr]    Compiling yew-macro v0.18.0
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.77
[INFO] [stderr]     Checking thiserror v1.0.29
[INFO] [stderr]     Checking js-sys v0.3.54
[INFO] [stderr]     Checking console_error_panic_hook v0.1.6
[INFO] [stderr]     Checking web-sys v0.3.54
[INFO] [stderr]     Checking wasm-bindgen-futures v0.4.27
[INFO] [stderr]     Checking git2 v0.13.22
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking gloo-events v0.1.1
[INFO] [stderr]     Checking gloo-console-timer v0.1.0
[INFO] [stderr]     Checking gloo-timers v0.2.1
[INFO] [stderr]     Checking gloo-file v0.1.0
[INFO] [stderr]     Checking gloo v0.2.1
[INFO] [stderr]     Checking webapp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `delta`
[INFO] [stdout]   --> src/bin/repo.rs:30:44
[INFO] [stdout]    |
[INFO] [stdout] 30 |             diff.print(DiffFormat::Patch, |delta, hunk, line| {
[INFO] [stdout]    |                                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_delta`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `delta`
[INFO] [stdout]   --> src/bin/repo.rs:30:44
[INFO] [stdout]    |
[INFO] [stdout] 30 |             diff.print(DiffFormat::Patch, |delta, hunk, line| {
[INFO] [stdout]    |                                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_delta`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/repo.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 | /             diff.print(DiffFormat::Patch, |delta, hunk, line| {
[INFO] [stdout] 31 | |                 println!("Hunk: {:?}", String::from_utf8_lossy(hunk.map(|h| h.header()).unwrap_or_default()));
[INFO] [stdout] 32 | |                 println!("Line: {:?}", String::from_utf8_lossy(line.content()));
[INFO] [stdout] 33 | |                 true
[INFO] [stdout] 34 | |             });
[INFO] [stdout]    | |______________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let _ = diff.print(DiffFormat::Patch, |delta, hunk, line| {
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/repo.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 | /             diff.print(DiffFormat::Patch, |delta, hunk, line| {
[INFO] [stdout] 31 | |                 println!("Hunk: {:?}", String::from_utf8_lossy(hunk.map(|h| h.header()).unwrap_or_default()));
[INFO] [stdout] 32 | |                 println!("Line: {:?}", String::from_utf8_lossy(line.content()));
[INFO] [stdout] 33 | |                 true
[INFO] [stdout] 34 | |             });
[INFO] [stdout]    | |______________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let _ = diff.print(DiffFormat::Patch, |delta, hunk, line| {
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 12s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: wasm-bindgen v0.2.77
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "4f2d7150b8afed435f31990b36981ec24072a7733249653359c415cdbf478cd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f2d7150b8afed435f31990b36981ec24072a7733249653359c415cdbf478cd5", kill_on_drop: false }`
[INFO] [stdout] 4f2d7150b8afed435f31990b36981ec24072a7733249653359c415cdbf478cd5