[INFO] fetching crate mut-binary-heap 0.1.0...
[INFO] checking mut-binary-heap-0.1.0 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124157
[INFO] extracting crate mut-binary-heap 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate mut-binary-heap 0.1.0 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-tc1/source/Cargo.toml
[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" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded compare v0.1.0
[INFO] [stderr]   Downloaded serde v1.0.155
[INFO] [stderr]   Downloaded serde_derive v1.0.155
[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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 43010a4db7fb41380696686af688e52c8e29f2b0f49c3985005a8996905cb7ee
[INFO] running `Command { std: "docker" "start" "-a" "43010a4db7fb41380696686af688e52c8e29f2b0f49c3985005a8996905cb7ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43010a4db7fb41380696686af688e52c8e29f2b0f49c3985005a8996905cb7ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43010a4db7fb41380696686af688e52c8e29f2b0f49c3985005a8996905cb7ee", kill_on_drop: false }`
[INFO] [stdout] 43010a4db7fb41380696686af688e52c8e29f2b0f49c3985005a8996905cb7ee
[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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cea633a97bedab0ad791e8f463d3b82905cc9dc395c9736dbd51b45a1c7f8448
[INFO] running `Command { std: "docker" "start" "-a" "cea633a97bedab0ad791e8f463d3b82905cc9dc395c9736dbd51b45a1c7f8448", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling serde v1.0.155
[INFO] [stderr]    Compiling serde_json v1.0.94
[INFO] [stderr]     Checking compare v0.1.0
[INFO] [stderr]     Checking mut-binary-heap v0.1.0 (/opt/rustwide/workdir)
[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 happend here
[INFO] [stdout] ...
[INFO] [stdout] 2211 |             let value = unsafe { &mut *mut_ptr };
[INFO] [stdout]      |                                  ^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[INFO] [stdout]      = note: `#[deny(invalid_reference_casting)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mut-binary-heap` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "cea633a97bedab0ad791e8f463d3b82905cc9dc395c9736dbd51b45a1c7f8448", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cea633a97bedab0ad791e8f463d3b82905cc9dc395c9736dbd51b45a1c7f8448", kill_on_drop: false }`
[INFO] [stdout] cea633a97bedab0ad791e8f463d3b82905cc9dc395c9736dbd51b45a1c7f8448
