[INFO] fetching crate lance-datagen 0.8.18...
[INFO] checking lance-datagen-0.8.18 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate lance-datagen 0.8.18 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate lance-datagen 0.8.18 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 crates.io crate lance-datagen 0.8.18
[INFO] finished tweaking crates.io crate lance-datagen 0.8.18
[INFO] tweaked toml for crates.io crate lance-datagen 0.8.18 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 189 packages
[INFO] [stderr]       Adding anes v0.1.6 (latest: v0.2.0)
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[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.4)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded arrow-schema v47.0.0
[INFO] [stderr]   Downloaded arrow-select v47.0.0
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[INFO] [stderr]   Downloaded arrow v47.0.0
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 414a83d51654629ce154efebae530c49cbbb36664362b38c8d281b4f8702b1af
[INFO] running `Command { std: "docker" "start" "-a" "414a83d51654629ce154efebae530c49cbbb36664362b38c8d281b4f8702b1af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "414a83d51654629ce154efebae530c49cbbb36664362b38c8d281b4f8702b1af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "414a83d51654629ce154efebae530c49cbbb36664362b38c8d281b4f8702b1af", kill_on_drop: false }`
[INFO] [stdout] 414a83d51654629ce154efebae530c49cbbb36664362b38c8d281b4f8702b1af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 860326b27dd4638e9295409e75fc40eb143004f601427eb38ffb8b481374a9d6
[INFO] running `Command { std: "docker" "start" "-a" "860326b27dd4638e9295409e75fc40eb143004f601427eb38ffb8b481374a9d6", kill_on_drop: false }`
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[INFO] [stderr]     Checking lance-datagen v0.8.18 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Utf8Type` is imported redundantly
[INFO] [stdout]    --> src/generator.rs:883:56
[INFO] [stdout]     |
[INFO] [stdout] 883 |         UInt16Type, UInt32Type, UInt64Type, UInt8Type, Utf8Type,
[INFO] [stdout]     |                                                        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 891 |     use super::*;
[INFO] [stdout]     |         -------- the item `Utf8Type` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Rng` is imported redundantly
[INFO] [stdout]    --> src/generator.rs:889:9
[INFO] [stdout]     |
[INFO] [stdout] 889 |     use rand::Rng;
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout] 890 |
[INFO] [stdout] 891 |     use super::*;
[INFO] [stdout]     |         -------- the item `Rng` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Utf8Type` is imported redundantly
[INFO] [stdout]    --> src/generator.rs:883:56
[INFO] [stdout]     |
[INFO] [stdout] 883 |         UInt16Type, UInt32Type, UInt64Type, UInt8Type, Utf8Type,
[INFO] [stdout]     |                                                        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 891 |     use super::*;
[INFO] [stdout]     |         -------- the item `Utf8Type` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Rng` is imported redundantly
[INFO] [stdout]    --> src/generator.rs:889:9
[INFO] [stdout]     |
[INFO] [stdout] 889 |     use rand::Rng;
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout] 890 |
[INFO] [stdout] 891 |     use super::*;
[INFO] [stdout]     |         -------- the item `Rng` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 33.52s
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "860326b27dd4638e9295409e75fc40eb143004f601427eb38ffb8b481374a9d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "860326b27dd4638e9295409e75fc40eb143004f601427eb38ffb8b481374a9d6", kill_on_drop: false }`
[INFO] [stdout] 860326b27dd4638e9295409e75fc40eb143004f601427eb38ffb8b481374a9d6