[INFO] cloning repository https://github.com/sjmann/rust_quiz
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sjmann/rust_quiz" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjmann%2Frust_quiz", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjmann%2Frust_quiz'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ba945bcb65e3ef430e24aee2b9b7758749e0e656
[INFO] checking sjmann/rust_quiz against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjmann%2Frust_quiz" "/workspace/builds/worker-102/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-102/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sjmann/rust_quiz on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sjmann/rust_quiz
[INFO] finished tweaking git repo https://github.com/sjmann/rust_quiz
[INFO] tweaked toml for git repo https://github.com/sjmann/rust_quiz written to /workspace/builds/worker-102/source/Cargo.toml
[INFO] crate git repo https://github.com/sjmann/rust_quiz already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3fb95c574137cc292899280d834e0ecfb75d9233efea2547df6f2c288b4af939
[INFO] running `Command { std: "docker" "start" "-a" "3fb95c574137cc292899280d834e0ecfb75d9233efea2547df6f2c288b4af939", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3fb95c574137cc292899280d834e0ecfb75d9233efea2547df6f2c288b4af939", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fb95c574137cc292899280d834e0ecfb75d9233efea2547df6f2c288b4af939", kill_on_drop: false }`
[INFO] [stdout] 3fb95c574137cc292899280d834e0ecfb75d9233efea2547df6f2c288b4af939
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d37bc2c5fb6e5cb3d60a5c1e193ed4774c71db5b8dd02e770ea6c5e033ccdec
[INFO] running `Command { std: "docker" "start" "-a" "6d37bc2c5fb6e5cb3d60a5c1e193ed4774c71db5b8dd02e770ea6c5e033ccdec", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rust_quiz v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stdout] warning: field is never read: `chapter`
[INFO] [stdout]  --> src/io_quiz/question.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     chapter: u8,
[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: field is never read: `chapter`
[INFO] [stdout]  --> src/io_quiz/question.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     chapter: u8,
[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 [unoptimized + debuginfo] target(s) in 0.51s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking rust_quiz v0.1.0 (/tmp/fixit)
[INFO] [stdout] warning: field is never read: `chapter`
[INFO] [stdout]  --> src/io_quiz/question.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     chapter: u8,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `chapter`
[INFO] [stdout]  --> src/io_quiz/question.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     chapter: u8,
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "6d37bc2c5fb6e5cb3d60a5c1e193ed4774c71db5b8dd02e770ea6c5e033ccdec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d37bc2c5fb6e5cb3d60a5c1e193ed4774c71db5b8dd02e770ea6c5e033ccdec", kill_on_drop: false }`
[INFO] [stdout] 6d37bc2c5fb6e5cb3d60a5c1e193ed4774c71db5b8dd02e770ea6c5e033ccdec