[INFO] fetching crate potpack 0.1.2...
[INFO] checking potpack-0.1.2 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate potpack 0.1.2 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate potpack 0.1.2
[INFO] finished tweaking crates.io crate potpack 0.1.2
[INFO] tweaked toml for crates.io crate potpack 0.1.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate potpack 0.1.2 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate potpack 0.1.2 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1a15abbbbdb0dcf4c44c52f368af70197c7074c2f555cd28a5e38b957255c1bf
[INFO] running `Command { std: "docker" "start" "-a" "1a15abbbbdb0dcf4c44c52f368af70197c7074c2f555cd28a5e38b957255c1bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a15abbbbdb0dcf4c44c52f368af70197c7074c2f555cd28a5e38b957255c1bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a15abbbbdb0dcf4c44c52f368af70197c7074c2f555cd28a5e38b957255c1bf", kill_on_drop: false }`
[INFO] [stdout] 1a15abbbbdb0dcf4c44c52f368af70197c7074c2f555cd28a5e38b957255c1bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d38d9b499853163cb1bf30dfbee17737d64a2ed50e81bcca14b9c0b4d60860cc
[INFO] running `Command { std: "docker" "start" "-a" "d38d9b499853163cb1bf30dfbee17737d64a2ed50e81bcca14b9c0b4d60860cc", kill_on_drop: false }`
[INFO] [stderr]     Checking potpack v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `PotPack`, `SizedItem`, and `approx_eq`
[INFO] [stdout]    --> src/lib.rs:192:9
[INFO] [stdout]     |
[INFO] [stdout] 192 |         approx_eq,
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout] 193 |         PotPack,
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 194 |         SizedItem
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]    --> src/lib.rs:190:1
[INFO] [stdout]     |
[INFO] [stdout] 190 | mod tests {
[INFO] [stdout]     | ^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |         for mut box_ in boxes.iter_mut() {
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |         for mut box_ in boxes.iter_mut() {
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "d38d9b499853163cb1bf30dfbee17737d64a2ed50e81bcca14b9c0b4d60860cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d38d9b499853163cb1bf30dfbee17737d64a2ed50e81bcca14b9c0b4d60860cc", kill_on_drop: false }`
[INFO] [stdout] d38d9b499853163cb1bf30dfbee17737d64a2ed50e81bcca14b9c0b4d60860cc