[INFO] cloning repository https://github.com/fredhsu/learning-system
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fredhsu/learning-system" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffredhsu%2Flearning-system", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffredhsu%2Flearning-system'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d1d6edaaca7425b7407952e9844772435f5f1034
[INFO] checking fredhsu/learning-system against try#4e55a504843955c97eb06907c71f6f3e99208021 for pr-146978
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffredhsu%2Flearning-system" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/fredhsu/learning-system
[INFO] finished tweaking git repo https://github.com/fredhsu/learning-system
[INFO] tweaked toml for git repo https://github.com/fredhsu/learning-system written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/fredhsu/learning-system on toolchain 4e55a504843955c97eb06907c71f6f3e99208021
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4e55a504843955c97eb06907c71f6f3e99208021" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/fredhsu/learning-system 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" "+4e55a504843955c97eb06907c71f6f3e99208021" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4e55a504843955c97eb06907c71f6f3e99208021" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] warning: struct `LLMMessage` is never constructed
[INFO] [stdout]  --> src/llm_providers.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct LLMMessage {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CardTopic` is never constructed
[INFO] [stdout]   --> src/models.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct CardTopic {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `QuizResponse` is never constructed
[INFO] [stdout]   --> src/models.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 93 | pub struct QuizResponse {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BatchGradingResponse` is never constructed
[INFO] [stdout]    --> src/models.rs:125:12
[INFO] [stdout]     |
[INFO] [stdout] 125 | pub struct BatchGradingResponse {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LLMMessage` is never constructed
[INFO] [stdout]  --> src/llm_providers.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct LLMMessage {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CardTopic` is never constructed
[INFO] [stdout]   --> src/models.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct CardTopic {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `QuizResponse` is never constructed
[INFO] [stdout]   --> src/models.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 93 | pub struct QuizResponse {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BatchGradingResponse` is never constructed
[INFO] [stdout]    --> src/models.rs:125:12
[INFO] [stdout]     |
[INFO] [stdout] 125 | pub struct BatchGradingResponse {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 25s
[INFO] running `Command { std: "docker" "inspect" "5bbb54eb44bbfaf32763b848c5b144d0e8a154ce63e17ae76f5afa85169b487c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bbb54eb44bbfaf32763b848c5b144d0e8a154ce63e17ae76f5afa85169b487c", kill_on_drop: false }`
[INFO] [stdout] 5bbb54eb44bbfaf32763b848c5b144d0e8a154ce63e17ae76f5afa85169b487c