[INFO] fetching crate median 0.3.2... [INFO] checking median-0.3.2 against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384 [INFO] extracting crate median 0.3.2 into /workspace/builds/worker-6-tc1/source [INFO] validating manifest of crates.io crate median 0.3.2 on toolchain 506512391b1a75ae450d36c9420978402a91abcc [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "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-6-tc1/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 19 packages to latest compatible versions [INFO] [stderr] Adding arraydeque v0.4.5 (latest: v0.5.1) [INFO] [stderr] Adding generic-array v0.14.7 (latest: v1.0.0) [INFO] [stderr] Adding missing_mpl v0.1.2 (latest: v0.2.0) [INFO] [stderr] Adding noisy_float v0.1.15 (latest: v0.2.0) [INFO] [stderr] Adding rand v0.4.6 (latest: v0.8.5) [INFO] [stderr] Adding rand_core v0.3.1 (latest: v0.6.4) [INFO] [stderr] Adding rand_core v0.4.2 (latest: v0.6.4) [INFO] [stderr] Adding rdrand v0.4.0 (latest: v0.8.3) [INFO] [stderr] Adding strsim v0.8.0 (latest: v0.11.1) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded noisy_float v0.1.15 [INFO] [stderr] Downloaded arraydeque v0.4.5 [INFO] [stderr] Downloaded missing_mpl v0.1.2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 1539e020009235dc9b4c3b214c0a9d69b956084e605de092359455c7259bdf07 [INFO] running `Command { std: "docker" "start" "-a" "1539e020009235dc9b4c3b214c0a9d69b956084e605de092359455c7259bdf07", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "1539e020009235dc9b4c3b214c0a9d69b956084e605de092359455c7259bdf07", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1539e020009235dc9b4c3b214c0a9d69b956084e605de092359455c7259bdf07", kill_on_drop: false }` [INFO] [stdout] 1539e020009235dc9b4c3b214c0a9d69b956084e605de092359455c7259bdf07 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] d72f73c9e2bbb75e1209e6feb77a8ae04893832fa56734d9e5235be8600f2511 [INFO] running `Command { std: "docker" "start" "-a" "d72f73c9e2bbb75e1209e6feb77a8ae04893832fa56734d9e5235be8600f2511", kill_on_drop: false }` [INFO] [stderr] Compiling arraydeque v0.4.5 [INFO] [stderr] Compiling generic-array v0.14.7 [INFO] [stderr] Checking noisy_float v0.1.15 [INFO] [stderr] Checking median v0.3.2 (/opt/rustwide/workdir) [INFO] [stdout] error[E0133]: call to unsafe function `MaybeUninit::::assume_init` 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[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] | ^^^^^^^^^^^^^^^ ------------- `self.aux_buffer` moved due to this method call [INFO] [stdout] | | [INFO] [stdout] | move occurs because `self.aux_buffer` has type `MaybeUninit`, which does not implement the `Copy` trait [INFO] [stdout] | [INFO] [stdout] note: `MaybeUninit::::assume_init` takes ownership of the receiver `self`, which moves `self.aux_buffer` [INFO] [stdout] --> /rustc/506512391b1a75ae450d36c9420978402a91abcc/library/core/src/mem/maybe_uninit.rs:627:37 [INFO] [stdout] help: you could `clone` the value and consume it, if the `A: Copy` trait bound could be satisfied [INFO] [stdout] | [INFO] [stdout] 49 | let slice = &mut as Clone>::clone(&self.aux_buffer).assume_init().as_mut_slice()[0..size]; [INFO] [stdout] | ++++++++++++++++++++++++++++++++++ + [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 value 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[E0133]: call to unsafe function `MaybeUninit::::assume_init` 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[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] | ^^^^^^^^^^^^^^^ ------------- `self.aux_buffer` moved due to this method call [INFO] [stdout] | | [INFO] [stdout] | move occurs because `self.aux_buffer` has type `MaybeUninit`, which does not implement the `Copy` trait [INFO] [stdout] | [INFO] [stdout] note: `MaybeUninit::::assume_init` takes ownership of the receiver `self`, which moves `self.aux_buffer` [INFO] [stdout] --> /rustc/506512391b1a75ae450d36c9420978402a91abcc/library/core/src/mem/maybe_uninit.rs:627:37 [INFO] [stdout] help: you could `clone` the value and consume it, if the `A: Copy` trait bound could be satisfied [INFO] [stdout] | [INFO] [stdout] 79 | let slice = &mut as Clone>::clone(&self.aux_buffer).assume_init().as_mut_slice()[0..size]; [INFO] [stdout] | ++++++++++++++++++++++++++++++++++ + [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: aborting due to 6 previous errors [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` (bench "main") due to 7 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "d72f73c9e2bbb75e1209e6feb77a8ae04893832fa56734d9e5235be8600f2511", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d72f73c9e2bbb75e1209e6feb77a8ae04893832fa56734d9e5235be8600f2511", kill_on_drop: false }` [INFO] [stdout] d72f73c9e2bbb75e1209e6feb77a8ae04893832fa56734d9e5235be8600f2511