[INFO] cloning repository https://github.com/kahnwong/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kahnwong/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkahnwong%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkahnwong%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4ae4b82f3995f75e1526d0a67b66f8a2a03a2f56
[INFO] checking kahnwong/rust-playground against try#901e6d56697c79b2e80df6a487b2318ec6f57ee3 for pr-142287
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkahnwong%2Frust-playground" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kahnwong/rust-playground 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 git repo https://github.com/kahnwong/rust-playground
[INFO] finished tweaking git repo https://github.com/kahnwong/rust-playground
[INFO] tweaked toml for git repo https://github.com/kahnwong/rust-playground written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/kahnwong/rust-playground 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] [stderr]     Blocking waiting for file lock on package cache
[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_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] 580ec553f2a7f1e172532a88314cb8e1b628bc0d5dd7700a5100dd56aaaf278a
[INFO] running `Command { std: "docker" "start" "-a" "580ec553f2a7f1e172532a88314cb8e1b628bc0d5dd7700a5100dd56aaaf278a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "580ec553f2a7f1e172532a88314cb8e1b628bc0d5dd7700a5100dd56aaaf278a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "580ec553f2a7f1e172532a88314cb8e1b628bc0d5dd7700a5100dd56aaaf278a", kill_on_drop: false }`
[INFO] [stdout] 580ec553f2a7f1e172532a88314cb8e1b628bc0d5dd7700a5100dd56aaaf278a
[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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a181aeed4c6ad57648d93dc4132cf86ac02b612cfdd578fa57495f9bf63259c
[INFO] running `Command { std: "docker" "start" "-a" "9a181aeed4c6ad57648d93dc4132cf86ac02b612cfdd578fa57495f9bf63259c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling version_check v0.9.5
[INFO] [stderr]    Compiling shlex v1.3.0
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling serde v1.0.210
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling target-features v0.1.6
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking regex-syntax v0.8.4
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking array-init-cursor v0.2.0
[INFO] [stderr]     Checking bitflags v2.6.0
[INFO] [stderr]    Compiling jobserver v0.1.32
[INFO] [stderr]    Compiling thiserror v1.0.63
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking either v1.13.0
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]    Compiling cc v1.1.18
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking planus v0.3.1
[INFO] [stderr]    Compiling smartstring v1.0.1
[INFO] [stderr]     Checking allocator-api2 v0.2.18
[INFO] [stderr]     Checking parking_lot v0.12.3
[INFO] [stderr]    Compiling polars-utils v0.42.0
[INFO] [stderr]     Checking equivalent v1.0.1
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]     Checking simdutf8 v0.1.4
[INFO] [stderr]     Checking chrono v0.4.38
[INFO] [stderr]     Checking raw-cpuid v11.1.0
[INFO] [stderr]     Checking memmap2 v0.7.1
[INFO] [stderr]    Compiling polars-arrow v0.42.0
[INFO] [stderr]     Checking bytes v1.7.1
[INFO] [stderr]     Checking regex-automata v0.4.7
[INFO] [stderr]     Checking strength_reduce v0.2.4
[INFO] [stderr]    Compiling psm v0.1.23
[INFO] [stderr]    Compiling stacker v0.1.17
[INFO] [stderr]     Checking fast-float v0.2.0
[INFO] [stderr]    Compiling rustversion v1.0.17
[INFO] [stderr]     Checking ethnum v1.5.0
[INFO] [stderr]    Compiling pkg-config v0.3.30
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]     Checking streaming-iterator v0.1.9
[INFO] [stderr]     Checking dyn-clone v1.0.17
[INFO] [stderr]     Checking ryu v1.0.18
[INFO] [stderr]     Checking atoi_simd v0.15.6
[INFO] [stderr]    Compiling zstd-sys v2.0.13+zstd.1.5.6
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling polars-compute v0.42.0
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]    Compiling lz4-sys v1.10.0
[INFO] [stderr]     Checking crossterm v0.27.0
[INFO] [stderr]    Compiling polars-core v0.42.0
[INFO] [stderr]     Checking unicode-width v0.1.13
[INFO] [stderr]     Checking alloc-no-stdlib v2.0.4
[INFO] [stderr]    Compiling zstd-safe v7.2.1
[INFO] [stderr]     Checking strum v0.26.3
[INFO] [stderr]     Checking alloc-stdlib v0.2.2
[INFO] [stderr]    Compiling polars-ops v0.42.0
[INFO] [stderr]    Compiling snap v1.1.1
[INFO] [stderr]     Checking xxhash-rust v0.8.12
[INFO] [stderr]     Checking adler2 v2.0.0
[INFO] [stderr]     Checking miniz_oxide v0.8.0
[INFO] [stderr]     Checking brotli-decompressor v4.0.1
[INFO] [stderr]     Checking argminmax v0.6.2
[INFO] [stderr]     Checking crc32fast v1.4.2
[INFO] [stderr]     Checking fallible-streaming-iterator v0.1.9
[INFO] [stderr]     Checking streaming-decompression v0.1.2
[INFO] [stderr]     Checking flate2 v1.0.33
[INFO] [stderr]     Checking brotli v6.0.0
[INFO] [stderr]     Checking regex v1.10.6
[INFO] [stderr]     Checking now v0.1.3
[INFO] [stderr]     Checking atoi v2.0.0
[INFO] [stderr]     Checking base64 v0.22.1
[INFO] [stderr]     Checking parquet-format-safe v0.2.4
[INFO] [stderr]    Compiling polars-plan v0.42.0
[INFO] [stderr]     Checking home v0.5.9
[INFO] [stderr]     Checking percent-encoding v2.3.1
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]    Compiling polars-lazy v0.42.0
[INFO] [stderr]    Compiling polars v0.42.0
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling serde_derive v1.0.210
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]    Compiling thiserror-impl v1.0.63
[INFO] [stderr]    Compiling bytemuck_derive v1.7.1
[INFO] [stderr]    Compiling multiversion-macros v0.7.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking bytemuck v1.18.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling strum_macros v0.26.4
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking multiversion v0.7.4
[INFO] [stderr]    Compiling recursive-proc-macro-impl v0.1.1
[INFO] [stderr]     Checking recursive v0.1.1
[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stderr]     Checking comfy-table v7.1.1
[INFO] [stderr]     Checking zstd v0.13.2
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]     Checking polars-arrow-format v0.1.0
[INFO] [stderr]     Checking indexmap v2.5.0
[INFO] [stderr]     Checking lz4 v1.26.0
[INFO] [stderr]     Checking polars-error v0.42.0
[INFO] [stderr]     Checking polars-row v0.42.0
[INFO] [stderr]     Checking polars-parquet v0.42.0
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/polars-core-0.42.0/src/chunked_array/mod.rs:215:9
[INFO] [stdout]     |
[INFO] [stdout] 215 | /         self.md.as_ref().try_read().map_or(
[INFO] [stdout] 216 | |             MetadataReadGuard::Locked(&Metadata::DEFAULT),
[INFO] [stdout]     | |                                        ----------------- temporary value created here
[INFO] [stdout] 217 | |             MetadataReadGuard::Unlocked,
[INFO] [stdout] 218 | |         )
[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] running `Command { std: "docker" "inspect" "9a181aeed4c6ad57648d93dc4132cf86ac02b612cfdd578fa57495f9bf63259c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a181aeed4c6ad57648d93dc4132cf86ac02b612cfdd578fa57495f9bf63259c", kill_on_drop: false }`
[INFO] [stdout] 9a181aeed4c6ad57648d93dc4132cf86ac02b612cfdd578fa57495f9bf63259c