[INFO] fetching crate anndata-memory 1.0.1...
[INFO] checking anndata-memory-1.0.1 against try#901e6d56697c79b2e80df6a487b2318ec6f57ee3 for pr-142287
[INFO] extracting crate anndata-memory 1.0.1 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate anndata-memory 1.0.1 on toolchain 901e6d56697c79b2e80df6a487b2318ec6f57ee3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate anndata-memory 1.0.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate anndata-memory 1.0.1
[INFO] tweaked toml for crates.io crate anndata-memory 1.0.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate anndata-memory 1.0.1 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" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 93565f2a5cacad9266f34acbe9a660b54f9b3839a842cf2530bfef448bb2f613
[INFO] running `Command { std: "docker" "start" "-a" "93565f2a5cacad9266f34acbe9a660b54f9b3839a842cf2530bfef448bb2f613", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "93565f2a5cacad9266f34acbe9a660b54f9b3839a842cf2530bfef448bb2f613", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93565f2a5cacad9266f34acbe9a660b54f9b3839a842cf2530bfef448bb2f613", kill_on_drop: false }`
[INFO] [stdout] 93565f2a5cacad9266f34acbe9a660b54f9b3839a842cf2530bfef448bb2f613
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e2aa5d7723e17226788f9383faca031acb94277d933cd39b5688c2591a669886
[INFO] running `Command { std: "docker" "start" "-a" "e2aa5d7723e17226788f9383faca031acb94277d933cd39b5688c2591a669886", kill_on_drop: false }`
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[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stderr]     Checking proptest v1.6.0
[INFO] [stderr]     Checking polars-arrow-format v0.1.0
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking compact_str v0.8.0
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[INFO] [stderr]     Checking ndarray v0.16.1
[INFO] [stderr]     Checking simba v0.9.0
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]     Checking polars-error v0.45.1
[INFO] [stderr]     Checking ndarray-rand v0.15.0
[INFO] [stderr]     Checking nalgebra v0.33.2
[INFO] [stderr]     Checking polars-row v0.45.1
[INFO] [stderr]     Checking polars-parquet v0.45.1
[INFO] [stderr]     Checking nalgebra-sparse v0.10.0
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/polars-core-0.45.1/src/chunked_array/mod.rs:254:9
[INFO] [stdout]     |
[INFO] [stdout] 254 | /         self.md.as_ref().try_read().map_or(
[INFO] [stdout] 255 | |             MetadataReadGuard::Locked(&Metadata::DEFAULT),
[INFO] [stdout]     | |                                        ----------------- temporary value created here
[INFO] [stdout] 256 | |             MetadataReadGuard::Unlocked,
[INFO] [stdout] 257 | |         )
[INFO] [stdout]     | |_________^ returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0515`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `polars-core` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e2aa5d7723e17226788f9383faca031acb94277d933cd39b5688c2591a669886", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2aa5d7723e17226788f9383faca031acb94277d933cd39b5688c2591a669886", kill_on_drop: false }`
[INFO] [stdout] e2aa5d7723e17226788f9383faca031acb94277d933cd39b5688c2591a669886