[INFO] cloning repository https://github.com/strickczq/szu-information-retrieval
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/strickczq/szu-information-retrieval" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstrickczq%2Fszu-information-retrieval", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstrickczq%2Fszu-information-retrieval'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e0b4f361c0f9ea0e5f8104860ac7a692a2b8618a
[INFO] checking strickczq/szu-information-retrieval against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstrickczq%2Fszu-information-retrieval" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/strickczq/szu-information-retrieval 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/strickczq/szu-information-retrieval
[INFO] finished tweaking git repo https://github.com/strickczq/szu-information-retrieval
[INFO] tweaked toml for git repo https://github.com/strickczq/szu-information-retrieval written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/strickczq/szu-information-retrieval 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 sprs v0.11.1
[INFO] [stderr]   Downloaded cedarwood v0.4.6
[INFO] [stderr]   Downloaded jieba-rs v0.6.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] f59819f90c49177fb45482970a7bd792c4fd74d7c3f41d177a2f36bd7a54bd9f
[INFO] running `Command { std: "docker" "start" "-a" "f59819f90c49177fb45482970a7bd792c4fd74d7c3f41d177a2f36bd7a54bd9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f59819f90c49177fb45482970a7bd792c4fd74d7c3f41d177a2f36bd7a54bd9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f59819f90c49177fb45482970a7bd792c4fd74d7c3f41d177a2f36bd7a54bd9f", kill_on_drop: false }`
[INFO] [stdout] f59819f90c49177fb45482970a7bd792c4fd74d7c3f41d177a2f36bd7a54bd9f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] ecc77b227cdbe6b85a7bc193dbbe5fdeede79a6842aca8ee036d56cc54aca45d
[INFO] running `Command { std: "docker" "start" "-a" "ecc77b227cdbe6b85a7bc193dbbe5fdeede79a6842aca8ee036d56cc54aca45d", kill_on_drop: false }`
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[INFO] [stderr]     Checking szu-ir v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `CsVec` is imported redundantly
[INFO] [stdout]   --> src/core/inverted_index.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     use super::*;
[INFO] [stdout]    |         -------- the item `CsVec` is already imported here
[INFO] [stdout] 59 |     use sprs::CsVec;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CsMat` is imported redundantly
[INFO] [stdout]    --> src/core/tfidf_vectorizer.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |     use super::*;
[INFO] [stdout]     |         -------- the item `CsMat` is already imported here
[INFO] [stdout] 102 |     use crate::almost_eq::AlmostEq;
[INFO] [stdout] 103 |     use sprs::CsMat;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.35s
[INFO] running `Command { std: "docker" "inspect" "ecc77b227cdbe6b85a7bc193dbbe5fdeede79a6842aca8ee036d56cc54aca45d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecc77b227cdbe6b85a7bc193dbbe5fdeede79a6842aca8ee036d56cc54aca45d", kill_on_drop: false }`
[INFO] [stdout] ecc77b227cdbe6b85a7bc193dbbe5fdeede79a6842aca8ee036d56cc54aca45d