[INFO] fetching crate rustkernel 0.0.21...
[INFO] building rustkernel-0.0.21 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate rustkernel 0.0.21 into /workspace/builds/worker-0-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-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rustkernel 0.0.21 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1fdbe4ff522a0a18118aa079f88a197a00da7eb7c5b016d2634e1d0e8e8715bc
[INFO] running `Command { std: "docker" "start" "-a" "1fdbe4ff522a0a18118aa079f88a197a00da7eb7c5b016d2634e1d0e8e8715bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1fdbe4ff522a0a18118aa079f88a197a00da7eb7c5b016d2634e1d0e8e8715bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fdbe4ff522a0a18118aa079f88a197a00da7eb7c5b016d2634e1d0e8e8715bc", kill_on_drop: false }`
[INFO] [stdout] 1fdbe4ff522a0a18118aa079f88a197a00da7eb7c5b016d2634e1d0e8e8715bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bdd57c006822844e963540ff378a01099696c67322b6bd14cc37b5cf2142dd30
[INFO] running `Command { std: "docker" "start" "-a" "bdd57c006822844e963540ff378a01099696c67322b6bd14cc37b5cf2142dd30", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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)]` (part of `#[warn(unused)]`) 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 0.63s
[INFO] running `Command { std: "docker" "inspect" "bdd57c006822844e963540ff378a01099696c67322b6bd14cc37b5cf2142dd30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdd57c006822844e963540ff378a01099696c67322b6bd14cc37b5cf2142dd30", kill_on_drop: false }`
[INFO] [stdout] bdd57c006822844e963540ff378a01099696c67322b6bd14cc37b5cf2142dd30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca4d490d7ba1012a4bf983bb53ba089d489953b05895c68c2cca3b85413e2558
[INFO] running `Command { std: "docker" "start" "-a" "ca4d490d7ba1012a4bf983bb53ba089d489953b05895c68c2cca3b85413e2558", kill_on_drop: false }`
[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)]` (part of `#[warn(unused)]`) 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]    Compiling 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)]` (part of `#[warn(unused)]`) 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 `test` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "ca4d490d7ba1012a4bf983bb53ba089d489953b05895c68c2cca3b85413e2558", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca4d490d7ba1012a4bf983bb53ba089d489953b05895c68c2cca3b85413e2558", kill_on_drop: false }`
[INFO] [stdout] ca4d490d7ba1012a4bf983bb53ba089d489953b05895c68c2cca3b85413e2558