[INFO] updating cached repository https://github.com/kvark/plane-splitter
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3b231bff3967e205340343c05bfa6ad66126a46c
[INFO] checking kvark/plane-splitter against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkvark%2Fplane-splitter" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kvark/plane-splitter on toolchain c9edc02e8320a9e5799d185910ece7d491f524e6-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/kvark/plane-splitter
[INFO] finished tweaking git repo https://github.com/kvark/plane-splitter
[INFO] tweaked toml for git repo https://github.com/kvark/plane-splitter written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/kvark/plane-splitter already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7e576bfe729084d1f5a50e7dc27e43e3c0f2b06b92f6209f5cf411d12cd0df3f
[INFO] running `"docker" "start" "-a" "7e576bfe729084d1f5a50e7dc27e43e3c0f2b06b92f6209f5cf411d12cd0df3f"`
[INFO] [stderr]    Compiling serde v1.0.79
[INFO] [stderr]     Checking spin v0.4.9
[INFO] [stderr]     Checking mint v0.4.9
[INFO] [stderr]    Compiling wayland-scanner v0.12.5
[INFO] [stderr]     Checking tempfile v3.0.4
[INFO] [stderr]    Compiling gl_generator v0.8.0
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]     Checking euclid v0.19.0
[INFO] [stderr]     Checking x11-dl v2.18.3
[INFO] [stderr]     Checking cgmath v0.16.1
[INFO] [stderr]     Checking froggy v0.4.4
[INFO] [stderr]     Checking cpal v0.4.6
[INFO] [stderr]     Checking wayland-sys v0.12.5
[INFO] [stderr]    Compiling flate2 v1.0.2
[INFO] [stderr]     Checking includedir v0.3.0
[INFO] [stderr]     Checking rusttype v0.3.0
[INFO] [stderr]     Checking genmesh v0.5.0
[INFO] [stderr]     Checking png v0.11.0
[INFO] [stderr]     Checking cgmath v0.15.0
[INFO] [stderr]     Checking plane-split v0.13.0
[INFO] [stderr]     Checking rodio v0.5.2
[INFO] [stderr]    Compiling wayland-client v0.12.5
[INFO] [stderr]    Compiling wayland-protocols v0.12.5
[INFO] [stderr]    Compiling includedir_codegen v0.3.0
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking obj v0.8.2
[INFO] [stderr]     Checking gfx_glyph v0.8.2
[INFO] [stderr]    Compiling glutin v0.12.2
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling three v0.3.1
[INFO] [stderr]     Checking image v0.18.0
[INFO] [stderr]     Checking wayland-kbd v0.13.1
[INFO] [stderr]     Checking wayland-window v0.13.3
[INFO] [stderr]     Checking winit v0.10.0
[INFO] [stderr]     Checking ron v0.4.0
[INFO] [stderr]     Checking gfx_window_glutin v0.20.0
[INFO] [stderr] warning[E0502]: cannot borrow `mapping` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/three-0.3.1/src/factory/mod.rs:738:13
[INFO] [stderr]     |
[INFO] [stderr] 738 |               mapping[i] = Vertex {
[INFO] [stderr]     |               -^^^^^^
[INFO] [stderr]     |               |
[INFO] [stderr]     |  _____________mutable borrow occurs here
[INFO] [stderr]     | |
[INFO] [stderr] 739 | |                 pos: [pos.x, pos.y, pos.z, 1.0],
[INFO] [stderr] 740 | |                 .. mapping[i]
[INFO] [stderr]     | |                    ------- immutable borrow occurs here
[INFO] [stderr] 741 | |             };
[INFO] [stderr]     | |_____________- immutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]     Checking splitter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:143:21
[INFO] [stderr]     |
[INFO] [stderr] 143 |                 let mut m = win.factory.mesh(geometry.clone(), mat);
[INFO] [stderr]     |                     ----^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:143:21
[INFO] [stderr]     |
[INFO] [stderr] 143 |                 let mut m = win.factory.mesh(geometry.clone(), mat);
[INFO] [stderr]     |                     ----^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 32s
[INFO] running `"docker" "inspect" "7e576bfe729084d1f5a50e7dc27e43e3c0f2b06b92f6209f5cf411d12cd0df3f"`
[INFO] running `"docker" "rm" "-f" "7e576bfe729084d1f5a50e7dc27e43e3c0f2b06b92f6209f5cf411d12cd0df3f"`
[INFO] [stdout] 7e576bfe729084d1f5a50e7dc27e43e3c0f2b06b92f6209f5cf411d12cd0df3f