[INFO] fetching crate panic-ub 0.0.0...
[INFO] checking panic-ub-0.0.0 against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1
[INFO] extracting crate panic-ub 0.0.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate panic-ub 0.0.0
[INFO] finished tweaking crates.io crate panic-ub 0.0.0
[INFO] tweaked toml for crates.io crate panic-ub 0.0.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate panic-ub 0.0.0 on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate panic-ub 0.0.0 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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f8881562fd6e7e0916a6a9ee8500ccb4c1510a29a72d244071237f7cf4e9787
[INFO] running `Command { std: "docker" "start" "-a" "0f8881562fd6e7e0916a6a9ee8500ccb4c1510a29a72d244071237f7cf4e9787", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f8881562fd6e7e0916a6a9ee8500ccb4c1510a29a72d244071237f7cf4e9787", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f8881562fd6e7e0916a6a9ee8500ccb4c1510a29a72d244071237f7cf4e9787", kill_on_drop: false }`
[INFO] [stdout] 0f8881562fd6e7e0916a6a9ee8500ccb4c1510a29a72d244071237f7cf4e9787
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35063daa5b6d5de6d3b6c442d8a7e55fa3d5ec50f875f85c6b91a0ab5233c4ba
[INFO] running `Command { std: "docker" "start" "-a" "35063daa5b6d5de6d3b6c442d8a7e55fa3d5ec50f875f85c6b91a0ab5233c4ba", kill_on_drop: false }`
[INFO] [stderr]     Checking panic-ub v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `hint::unreachable_unchecked` and `panic::PanicInfo`
[INFO] [stdout]  --> src/lib.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 |     use core::{hint::unreachable_unchecked, panic::PanicInfo};
[INFO] [stdout]   |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `hint::unreachable_unchecked` and `panic::PanicInfo`
[INFO] [stdout]  --> src/lib.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 |     use core::{hint::unreachable_unchecked, panic::PanicInfo};
[INFO] [stdout]   |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "35063daa5b6d5de6d3b6c442d8a7e55fa3d5ec50f875f85c6b91a0ab5233c4ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35063daa5b6d5de6d3b6c442d8a7e55fa3d5ec50f875f85c6b91a0ab5233c4ba", kill_on_drop: false }`
[INFO] [stdout] 35063daa5b6d5de6d3b6c442d8a7e55fa3d5ec50f875f85c6b91a0ab5233c4ba