[INFO] fetching crate rustkernel 0.0.21...
[INFO] checking rustkernel-0.0.21 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] extracting crate rustkernel 0.0.21 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate rustkernel 0.0.21
[INFO] finished tweaking crates.io crate rustkernel 0.0.21
[INFO] tweaked toml for crates.io crate rustkernel 0.0.21 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rustkernel 0.0.21 on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rustkernel 0.0.21 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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb4b86ad39ee0092602d246c3045a7dabfda98e5a4e0cc2cdb7907b2245cc191
[INFO] running `Command { std: "docker" "start" "-a" "fb4b86ad39ee0092602d246c3045a7dabfda98e5a4e0cc2cdb7907b2245cc191", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb4b86ad39ee0092602d246c3045a7dabfda98e5a4e0cc2cdb7907b2245cc191", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb4b86ad39ee0092602d246c3045a7dabfda98e5a4e0cc2cdb7907b2245cc191", kill_on_drop: false }`
[INFO] [stdout] fb4b86ad39ee0092602d246c3045a7dabfda98e5a4e0cc2cdb7907b2245cc191
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 24f4ff9369b6ff7d8143b2a6551e1506fbb792781d9a5fb37e359fb7e4dc70bc
[INFO] running `Command { std: "docker" "start" "-a" "24f4ff9369b6ff7d8143b2a6551e1506fbb792781d9a5fb37e359fb7e4dc70bc", kill_on_drop: false }`
[INFO] [stderr]     Checking rustkernel v0.0.21 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]   --> src/program.rs:77:75
[INFO] [stdout]    |
[INFO] [stdout] 77 |         let mut cells_vec: Vec<&Cell> = self.cells.iter().map(|(_, cell)| (cell)).collect();
[INFO] [stdout]    |                                                                           ^    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 77 -         let mut cells_vec: Vec<&Cell> = self.cells.iter().map(|(_, cell)| (cell)).collect();
[INFO] [stdout] 77 +         let mut cells_vec: Vec<&Cell> = self.cells.iter().map(|(_, cell)| cell).collect();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]   --> src/program.rs:77:75
[INFO] [stdout]    |
[INFO] [stdout] 77 |         let mut cells_vec: Vec<&Cell> = self.cells.iter().map(|(_, cell)| (cell)).collect();
[INFO] [stdout]    |                                                                           ^    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 77 -         let mut cells_vec: Vec<&Cell> = self.cells.iter().map(|(_, cell)| (cell)).collect();
[INFO] [stdout] 77 +         let mut cells_vec: Vec<&Cell> = self.cells.iter().map(|(_, cell)| cell).collect();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "24f4ff9369b6ff7d8143b2a6551e1506fbb792781d9a5fb37e359fb7e4dc70bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24f4ff9369b6ff7d8143b2a6551e1506fbb792781d9a5fb37e359fb7e4dc70bc", kill_on_drop: false }`
[INFO] [stdout] 24f4ff9369b6ff7d8143b2a6551e1506fbb792781d9a5fb37e359fb7e4dc70bc