[INFO] fetching crate mut-binary-heap 0.1.0... [INFO] checking mut-binary-heap-0.1.0 against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1 [INFO] extracting crate mut-binary-heap 0.1.0 into /workspace/builds/worker-4-tc2/source [INFO] started tweaking crates.io crate mut-binary-heap 0.1.0 [INFO] finished tweaking crates.io crate mut-binary-heap 0.1.0 [INFO] tweaked toml for crates.io crate mut-binary-heap 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate mut-binary-heap 0.1.0 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 mut-binary-heap 0.1.0 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] ee8cf76f4f098eddb3f7518d663f7c63d1a94e043862ff267eaa75b9b75344b0 [INFO] running `Command { std: "docker" "start" "-a" "ee8cf76f4f098eddb3f7518d663f7c63d1a94e043862ff267eaa75b9b75344b0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ee8cf76f4f098eddb3f7518d663f7c63d1a94e043862ff267eaa75b9b75344b0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ee8cf76f4f098eddb3f7518d663f7c63d1a94e043862ff267eaa75b9b75344b0", kill_on_drop: false }` [INFO] [stdout] ee8cf76f4f098eddb3f7518d663f7c63d1a94e043862ff267eaa75b9b75344b0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 5d652e7e53b076e4b40715a06ca4675b68e81e260a2484628912c3e1771d7438 [INFO] running `Command { std: "docker" "start" "-a" "5d652e7e53b076e4b40715a06ca4675b68e81e260a2484628912c3e1771d7438", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.140 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Compiling serde v1.0.155 [INFO] [stderr] Checking ppv-lite86 v0.2.17 [INFO] [stderr] Compiling serde_json v1.0.94 [INFO] [stderr] Checking itoa v1.0.6 [INFO] [stderr] Checking ryu v1.0.13 [INFO] [stderr] Checking compare v0.1.0 [INFO] [stderr] Checking mut-binary-heap v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unnecessary parentheses around closure body [INFO] [stdout] --> src/binary_heap.rs:2138:35 [INFO] [stdout] | [INFO] [stdout] 2138 | self.iter.last().map(|kv| (&kv.1)) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 2138 - self.iter.last().map(|kv| (&kv.1)) [INFO] [stdout] 2138 + self.iter.last().map(|kv| &kv.1) [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around closure body [INFO] [stdout] --> src/binary_heap.rs:2164:35 [INFO] [stdout] | [INFO] [stdout] 2164 | self.iter.last().map(|kv| (&kv.0)) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 2164 - self.iter.last().map(|kv| (&kv.0)) [INFO] [stdout] 2164 + self.iter.last().map(|kv| &kv.0) [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell` [INFO] [stdout] --> src/binary_heap.rs:2211:34 [INFO] [stdout] | [INFO] [stdout] 2204 | let mut_ptr: *mut T = ptr as *mut T; [INFO] [stdout] | ------------- casting happened here [INFO] [stdout] ... [INFO] [stdout] 2211 | let value = unsafe { &mut *mut_ptr }; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: for more information, visit [INFO] [stdout] = note: `#[deny(invalid_reference_casting)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `mut-binary-heap` (lib) due to 1 previous error; 2 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "5d652e7e53b076e4b40715a06ca4675b68e81e260a2484628912c3e1771d7438", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5d652e7e53b076e4b40715a06ca4675b68e81e260a2484628912c3e1771d7438", kill_on_drop: false }` [INFO] [stdout] 5d652e7e53b076e4b40715a06ca4675b68e81e260a2484628912c3e1771d7438