[INFO] cloning repository https://github.com/vcd2df/rs_ex
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vcd2df/rs_ex" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvcd2df%2Frs_ex", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvcd2df%2Frs_ex'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8cb4d0c3be0eeef3e7586e17a29b104f789c1b5c
[INFO] checking vcd2df/rs_ex against master#8202d110516c6bd87cee375e9a9b774db499015c for pr-149596
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvcd2df%2Frs_ex" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/vcd2df/rs_ex
[INFO] finished tweaking git repo https://github.com/vcd2df/rs_ex
[INFO] tweaked toml for git repo https://github.com/vcd2df/rs_ex written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/vcd2df/rs_ex on toolchain 8202d110516c6bd87cee375e9a9b774db499015c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8202d110516c6bd87cee375e9a9b774db499015c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/vcd2df/rs_ex 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" "+8202d110516c6bd87cee375e9a9b774db499015c" "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-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+8202d110516c6bd87cee375e9a9b774db499015c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e9adc2da8c4ed5e87183f8d89c9147f9066f9fde472cc40cd5a943c1cc14c8d9
[INFO] running `Command { std: "docker" "start" "-a" "e9adc2da8c4ed5e87183f8d89c9147f9066f9fde472cc40cd5a943c1cc14c8d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e9adc2da8c4ed5e87183f8d89c9147f9066f9fde472cc40cd5a943c1cc14c8d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9adc2da8c4ed5e87183f8d89c9147f9066f9fde472cc40cd5a943c1cc14c8d9", kill_on_drop: false }`
[INFO] [stdout] e9adc2da8c4ed5e87183f8d89c9147f9066f9fde472cc40cd5a943c1cc14c8d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+8202d110516c6bd87cee375e9a9b774db499015c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6481c1204fd256cae2440fabb2a32f3b04b9488de90790e4bc644711fc82b32
[INFO] running `Command { std: "docker" "start" "-a" "e6481c1204fd256cae2440fabb2a32f3b04b9488de90790e4bc644711fc82b32", kill_on_drop: false }`
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[INFO] [stderr]     Checking polars-time v0.49.1
[INFO] [stderr]     Checking polars-io v0.49.1
[INFO] [stderr]     Checking polars-time v0.50.0
[INFO] [stderr]     Checking polars-io v0.50.0
[INFO] [stderr]     Checking vcd2df v0.1.2
[INFO] [stderr]     Checking rs_ex v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `polars::prelude`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use polars::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `polars::prelude`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use polars::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 22s
[INFO] running `Command { std: "docker" "inspect" "e6481c1204fd256cae2440fabb2a32f3b04b9488de90790e4bc644711fc82b32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6481c1204fd256cae2440fabb2a32f3b04b9488de90790e4bc644711fc82b32", kill_on_drop: false }`
[INFO] [stdout] e6481c1204fd256cae2440fabb2a32f3b04b9488de90790e4bc644711fc82b32