[INFO] fetching crate rustkernel 0.0.21...
[INFO] testing rustkernel-0.0.21 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-8
[INFO] extracting crate rustkernel 0.0.21 into /workspace/builds/worker-4-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-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rustkernel 0.0.21 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d88fa9f781bed1b53aa3b7d5c8ad46bc9d586380a4a7074ac2dfc4f261a46465
[INFO] running `Command { std: "docker" "start" "-a" "d88fa9f781bed1b53aa3b7d5c8ad46bc9d586380a4a7074ac2dfc4f261a46465", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d88fa9f781bed1b53aa3b7d5c8ad46bc9d586380a4a7074ac2dfc4f261a46465", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d88fa9f781bed1b53aa3b7d5c8ad46bc9d586380a4a7074ac2dfc4f261a46465", kill_on_drop: false }`
[INFO] [stdout] d88fa9f781bed1b53aa3b7d5c8ad46bc9d586380a4a7074ac2dfc4f261a46465
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1cad08483cb35845d65e1623ad59a554a1c312f5582bf5fe26eba2cd246ece6b
[INFO] running `Command { std: "docker" "start" "-a" "1cad08483cb35845d65e1623ad59a554a1c312f5582bf5fe26eba2cd246ece6b", 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 0.55s
[INFO] running `Command { std: "docker" "inspect" "1cad08483cb35845d65e1623ad59a554a1c312f5582bf5fe26eba2cd246ece6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cad08483cb35845d65e1623ad59a554a1c312f5582bf5fe26eba2cd246ece6b", kill_on_drop: false }`
[INFO] [stdout] 1cad08483cb35845d65e1623ad59a554a1c312f5582bf5fe26eba2cd246ece6b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 50299d071c6f3ca1efe6309cd5b67cce22b995f37db743985ae301e6c2ffdfdb
[INFO] running `Command { std: "docker" "start" "-a" "50299d071c6f3ca1efe6309cd5b67cce22b995f37db743985ae301e6c2ffdfdb", 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] [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 0.34s
[INFO] running `Command { std: "docker" "inspect" "50299d071c6f3ca1efe6309cd5b67cce22b995f37db743985ae301e6c2ffdfdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50299d071c6f3ca1efe6309cd5b67cce22b995f37db743985ae301e6c2ffdfdb", kill_on_drop: false }`
[INFO] [stdout] 50299d071c6f3ca1efe6309cd5b67cce22b995f37db743985ae301e6c2ffdfdb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9f6d0ca699bfb607db46c39bd2d95efb826b5573ecae50cb6a2a8d939c81716a
[INFO] running `Command { std: "docker" "start" "-a" "9f6d0ca699bfb607db46c39bd2d95efb826b5573ecae50cb6a2a8d939c81716a", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around closure body
[INFO] [stderr]   --> src/program.rs:77:75
[INFO] [stderr]    |
[INFO] [stderr] 77 |         let mut cells_vec: Vec<&Cell> = self.cells.iter().map(|(_, cell)| (cell)).collect();
[INFO] [stderr]    |                                                                           ^    ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 77 -         let mut cells_vec: Vec<&Cell> = self.cells.iter().map(|(_, cell)| (cell)).collect();
[INFO] [stderr] 77 +         let mut cells_vec: Vec<&Cell> = self.cells.iter().map(|(_, cell)| cell).collect();
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `rustkernel` (lib) generated 1 warning (run `cargo fix --lib -p rustkernel` to apply 1 suggestion)
[INFO] [stderr] warning: `rustkernel` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rustkernel-591bd8248f1577f1)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustkernel-c6b410f3f352d303)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rustkernel
[INFO] [stderr] warning: unnecessary parentheses around closure body
[INFO] [stderr]   --> src/program.rs:77:75
[INFO] [stderr]    |
[INFO] [stderr] 77 |         let mut cells_vec: Vec<&Cell> = self.cells.iter().map(|(_, cell)| (cell)).collect();
[INFO] [stderr]    |                                                                           ^    ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 77 -         let mut cells_vec: Vec<&Cell> = self.cells.iter().map(|(_, cell)| (cell)).collect();
[INFO] [stderr] 77 +         let mut cells_vec: Vec<&Cell> = self.cells.iter().map(|(_, cell)| cell).collect();
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9f6d0ca699bfb607db46c39bd2d95efb826b5573ecae50cb6a2a8d939c81716a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f6d0ca699bfb607db46c39bd2d95efb826b5573ecae50cb6a2a8d939c81716a", kill_on_drop: false }`
[INFO] [stdout] 9f6d0ca699bfb607db46c39bd2d95efb826b5573ecae50cb6a2a8d939c81716a