[INFO] fetching crate image4-util 0.5.2...
[INFO] checking image4-util-0.5.2 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate image4-util 0.5.2 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate image4-util 0.5.2 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate image4-util 0.5.2
[INFO] finished tweaking crates.io crate image4-util 0.5.2
[INFO] tweaked toml for crates.io crate image4-util 0.5.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate image4-util 0.5.2 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded flagset v0.4.3
[INFO] [stderr]   Downloaded const-oid v0.9.4
[INFO] [stderr]   Downloaded x509-cert v0.2.4
[INFO] [stderr]   Downloaded primeorder v0.13.2
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[INFO] [stderr]   Downloaded cc v1.0.81
[INFO] [stderr]   Downloaded p256 v0.13.2
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[INFO] [stderr]   Downloaded rustix v0.38.7
[INFO] [stderr]   Downloaded quick-xml v0.29.0
[INFO] [stderr]   Downloaded serde_derive v1.0.182
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[INFO] [stderr]   Downloaded serde v1.0.182
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[INFO] [stderr]   Downloaded pem-rfc7468 v0.7.0
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 865e9b9761818d60bf766f451cbdb6f2df2a7ce3cb18c3aa0b5e07fd06d617e9
[INFO] running `Command { std: "docker" "start" "-a" "865e9b9761818d60bf766f451cbdb6f2df2a7ce3cb18c3aa0b5e07fd06d617e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "865e9b9761818d60bf766f451cbdb6f2df2a7ce3cb18c3aa0b5e07fd06d617e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "865e9b9761818d60bf766f451cbdb6f2df2a7ce3cb18c3aa0b5e07fd06d617e9", kill_on_drop: false }`
[INFO] [stdout] 865e9b9761818d60bf766f451cbdb6f2df2a7ce3cb18c3aa0b5e07fd06d617e9
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d392e9b16a3ce4c140a5b7b57c4cb3236ffc311054b38d580d245a0c71345ac
[INFO] running `Command { std: "docker" "start" "-a" "1d392e9b16a3ce4c140a5b7b57c4cb3236ffc311054b38d580d245a0c71345ac", kill_on_drop: false }`
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[INFO] [stderr]     Checking image4-util v0.5.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `der` is imported redundantly
[INFO] [stdout]  --> src/cert.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |         self,
[INFO] [stdout]   |         ^^^^ the item `der` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `der` is imported redundantly
[INFO] [stdout]  --> src/util.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     der,
[INFO] [stdout]   |     ^^^ the item `der` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `der` is imported redundantly
[INFO] [stdout]  --> src/cert.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |         self,
[INFO] [stdout]   |         ^^^^ the item `der` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `der` is imported redundantly
[INFO] [stdout]  --> src/util.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     der,
[INFO] [stdout]   |     ^^^ the item `der` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.11s
[INFO] running `Command { std: "docker" "inspect" "1d392e9b16a3ce4c140a5b7b57c4cb3236ffc311054b38d580d245a0c71345ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d392e9b16a3ce4c140a5b7b57c4cb3236ffc311054b38d580d245a0c71345ac", kill_on_drop: false }`
[INFO] [stdout] 1d392e9b16a3ce4c140a5b7b57c4cb3236ffc311054b38d580d245a0c71345ac