[INFO] fetching crate median 0.3.2...
[INFO] checking median-0.3.2 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate median 0.3.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate median 0.3.2 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate median 0.3.2
[INFO] finished tweaking crates.io crate median 0.3.2
[INFO] tweaked toml for crates.io crate median 0.3.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a9a31a4e8b7c2dc9b95be6ee84f1303aeb80daeadbf55eb561dd97a12dcea38b
[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" "a9a31a4e8b7c2dc9b95be6ee84f1303aeb80daeadbf55eb561dd97a12dcea38b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a9a31a4e8b7c2dc9b95be6ee84f1303aeb80daeadbf55eb561dd97a12dcea38b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9a31a4e8b7c2dc9b95be6ee84f1303aeb80daeadbf55eb561dd97a12dcea38b", kill_on_drop: false }`
[INFO] [stdout] a9a31a4e8b7c2dc9b95be6ee84f1303aeb80daeadbf55eb561dd97a12dcea38b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9da147b1ed56bc69a3e931b385047aeaf41da04d4c3f4f0bdbeaa5b29ea2061f
[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" "9da147b1ed56bc69a3e931b385047aeaf41da04d4c3f4f0bdbeaa5b29ea2061f", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.14.0
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling arraydeque v0.4.5
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking noisy_float v0.1.15
[INFO] [stderr]     Checking median v0.3.2 (/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` due to 7 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "9da147b1ed56bc69a3e931b385047aeaf41da04d4c3f4f0bdbeaa5b29ea2061f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9da147b1ed56bc69a3e931b385047aeaf41da04d4c3f4f0bdbeaa5b29ea2061f", kill_on_drop: false }`
[INFO] [stdout] 9da147b1ed56bc69a3e931b385047aeaf41da04d4c3f4f0bdbeaa5b29ea2061f