[INFO] fetching crate median 0.3.1...
[INFO] checking median-0.3.1 against master#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] extracting crate median 0.3.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate median 0.3.1 on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate median 0.3.1
[INFO] finished tweaking crates.io crate median 0.3.1
[INFO] tweaked toml for crates.io crate median 0.3.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 286e6884abd6450ccc00f9d8676b3d5708a8db87418a6ad22d227e941740f87d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "286e6884abd6450ccc00f9d8676b3d5708a8db87418a6ad22d227e941740f87d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "286e6884abd6450ccc00f9d8676b3d5708a8db87418a6ad22d227e941740f87d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "286e6884abd6450ccc00f9d8676b3d5708a8db87418a6ad22d227e941740f87d", kill_on_drop: false }`
[INFO] [stdout] 286e6884abd6450ccc00f9d8676b3d5708a8db87418a6ad22d227e941740f87d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f661fee0029cab324afe22be0f1447859e18396109e958968e3044dcaf237eb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3f661fee0029cab324afe22be0f1447859e18396109e958968e3044dcaf237eb", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling arraydeque v0.4.5
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking generic-array v0.11.2
[INFO] [stderr]     Checking noisy_float v0.1.15
[INFO] [stderr]     Checking median v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> benches/main.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let mut aux_buffer = mem::MaybeUninit::<A>::uninit();
[INFO] [stdout]    |             ----^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0507]: cannot move out of `self.aux_buffer` which is behind a mutable reference
[INFO] [stdout]   --> benches/main.rs:49:30
[INFO] [stdout]    |
[INFO] [stdout] 49 |             let slice = &mut self.aux_buffer.assume_init().as_mut_slice()[0..size];
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^ move occurs because `self.aux_buffer` has type `MaybeUninit<A>`, which does not implement the `Copy` trait
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0716]: temporary value dropped while borrowed
[INFO] [stdout]   --> benches/main.rs:49:30
[INFO] [stdout]    |
[INFO] [stdout] 49 |             let slice = &mut self.aux_buffer.assume_init().as_mut_slice()[0..size];
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                        - temporary value is freed at the end of this statement
[INFO] [stdout]    |                              |
[INFO] [stdout]    |                              creates a temporary which is freed while still in use
[INFO] [stdout] 50 |             for (index, item) in self.buffer.iter().enumerate() {
[INFO] [stdout] 51 |                 slice[index] = item.clone();
[INFO] [stdout]    |                 ------------ borrow later used here
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using a `let` binding to create a longer lived value
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0507]: cannot move out of `self.aux_buffer` which is behind a mutable reference
[INFO] [stdout]   --> benches/main.rs:79:26
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let slice = &mut self.aux_buffer.assume_init().as_mut_slice()[0..size];
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^ move occurs because `self.aux_buffer` has type `MaybeUninit<A>`, which does not implement the `Copy` trait
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]   --> benches/main.rs:81:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let slice = &mut self.aux_buffer.assume_init().as_mut_slice()[0..size];
[INFO] [stdout]    |                          ----------------------------- temporary value created here
[INFO] [stdout] 80 |         if low == high {
[INFO] [stdout] 81 |             &slice[low]
[INFO] [stdout]    |             ^^^^^^^^^^^ returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0133]: call to unsafe function is unsafe and requires unsafe function or block
[INFO] [stdout]   --> benches/main.rs:49:30
[INFO] [stdout]    |
[INFO] [stdout] 49 |             let slice = &mut self.aux_buffer.assume_init().as_mut_slice()[0..size];
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call to unsafe function
[INFO] [stdout]    |
[INFO] [stdout]    = note: consult the function's documentation for information on how to avoid undefined behavior
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0133]: call to unsafe function is unsafe and requires unsafe function or block
[INFO] [stdout]   --> benches/main.rs:79:26
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let slice = &mut self.aux_buffer.assume_init().as_mut_slice()[0..size];
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ call to unsafe function
[INFO] [stdout]    |
[INFO] [stdout]    = note: consult the function's documentation for information on how to avoid undefined behavior
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0133, E0507, E0515, E0716.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0133`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `median`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "3f661fee0029cab324afe22be0f1447859e18396109e958968e3044dcaf237eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f661fee0029cab324afe22be0f1447859e18396109e958968e3044dcaf237eb", kill_on_drop: false }`
[INFO] [stdout] 3f661fee0029cab324afe22be0f1447859e18396109e958968e3044dcaf237eb