[INFO] cloning repository https://github.com/TheCheesyWiggle/Mergesort-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TheCheesyWiggle/Mergesort-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheCheesyWiggle%2FMergesort-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheCheesyWiggle%2FMergesort-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2538bdb239e59c162594bc5b8bdc0f165ad4c11e
[INFO] checking TheCheesyWiggle/Mergesort-Rust against master#e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682 for beta-170-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheCheesyWiggle%2FMergesort-Rust" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TheCheesyWiggle/Mergesort-Rust on toolchain e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/TheCheesyWiggle/Mergesort-Rust
[INFO] finished tweaking git repo https://github.com/TheCheesyWiggle/Mergesort-Rust
[INFO] tweaked toml for git repo https://github.com/TheCheesyWiggle/Mergesort-Rust written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/TheCheesyWiggle/Mergesort-Rust 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" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9dca2db768d53cd77ca123416e30de31d6f5e59911ad61e4a1a66fb160020c52
[INFO] running `Command { std: "docker" "start" "-a" "9dca2db768d53cd77ca123416e30de31d6f5e59911ad61e4a1a66fb160020c52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9dca2db768d53cd77ca123416e30de31d6f5e59911ad61e4a1a66fb160020c52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dca2db768d53cd77ca123416e30de31d6f5e59911ad61e4a1a66fb160020c52", kill_on_drop: false }`
[INFO] [stdout] 9dca2db768d53cd77ca123416e30de31d6f5e59911ad61e4a1a66fb160020c52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5a1baec16f0ac37744fd3ea7e4bb6b92d17ab5a9d4eee70b7933db2ebdb2479f
[INFO] running `Command { std: "docker" "start" "-a" "5a1baec16f0ac37744fd3ea7e4bb6b92d17ab5a9d4eee70b7933db2ebdb2479f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.116
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking merge_sort v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the type `[i32]` cannot be indexed by `&mut i32`
[INFO] [stdout]  --> src/main.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 |         array[z] == rand::random();
[INFO] [stdout]   |               ^ slice indices are of type `usize` or ranges of `usize`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `SliceIndex<[i32]>` is not implemented for `&mut i32`
[INFO] [stdout]   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
[INFO] [stdout]   = note: required for `[i32]` to implement `Index<&mut i32>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the type `[i32]` cannot be indexed by `&mut i32`
[INFO] [stdout]  --> src/main.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 |         array[z] == rand::random();
[INFO] [stdout]   |               ^ slice indices are of type `usize` or ranges of `usize`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `SliceIndex<[i32]>` is not implemented for `&mut i32`
[INFO] [stdout]   = help: the trait `SliceIndex<[T]>` is implemented for `usize`
[INFO] [stdout]   = note: required for `[i32]` to implement `Index<&mut i32>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let &mut left = [mid..];
[INFO] [stdout]    |         ^^^^^^^^^   ------- this expression has type `[RangeFrom<usize>; 1]`
[INFO] [stdout]    |         |
[INFO] [stdout]    |         expected `[RangeFrom<usize>; 1]`, found `&mut _`
[INFO] [stdout]    |         help: to declare a mutable variable use: `mut left`
[INFO] [stdout]    |
[INFO] [stdout]    = note:          expected array `[RangeFrom<usize>; 1]`
[INFO] [stdout]            found mutable reference `&mut _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let &mut right = [..mid];
[INFO] [stdout]    |         ^^^^^^^^^^   ------- this expression has type `[RangeTo<usize>; 1]`
[INFO] [stdout]    |         |
[INFO] [stdout]    |         expected `[RangeTo<usize>; 1]`, found `&mut _`
[INFO] [stdout]    |         help: to declare a mutable variable use: `mut right`
[INFO] [stdout]    |
[INFO] [stdout]    = note:          expected array `[RangeTo<usize>; 1]`
[INFO] [stdout]            found mutable reference `&mut _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let &mut left = [mid..];
[INFO] [stdout]    |         ^^^^^^^^^   ------- this expression has type `[RangeFrom<usize>; 1]`
[INFO] [stdout]    |         |
[INFO] [stdout]    |         expected `[RangeFrom<usize>; 1]`, found `&mut _`
[INFO] [stdout]    |         help: to declare a mutable variable use: `mut left`
[INFO] [stdout]    |
[INFO] [stdout]    = note:          expected array `[RangeFrom<usize>; 1]`
[INFO] [stdout]            found mutable reference `&mut _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let &mut right = [..mid];
[INFO] [stdout]    |         ^^^^^^^^^^   ------- this expression has type `[RangeTo<usize>; 1]`
[INFO] [stdout]    |         |
[INFO] [stdout]    |         expected `[RangeTo<usize>; 1]`, found `&mut _`
[INFO] [stdout]    |         help: to declare a mutable variable use: `mut right`
[INFO] [stdout]    |
[INFO] [stdout]    = note:          expected array `[RangeTo<usize>; 1]`
[INFO] [stdout]            found mutable reference `&mut _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `merge_sort` (bin "merge_sort" test) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `merge_sort` (bin "merge_sort") due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "5a1baec16f0ac37744fd3ea7e4bb6b92d17ab5a9d4eee70b7933db2ebdb2479f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a1baec16f0ac37744fd3ea7e4bb6b92d17ab5a9d4eee70b7933db2ebdb2479f", kill_on_drop: false }`
[INFO] [stdout] 5a1baec16f0ac37744fd3ea7e4bb6b92d17ab5a9d4eee70b7933db2ebdb2479f
