[INFO] updating cached repository https://github.com/pentagolo/blocks
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0e5d3e0887f74cffd6c97bf82f1d39e8c5a2d600
[INFO] testing pentagolo/blocks against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpentagolo%2Fblocks" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pentagolo/blocks on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pentagolo/blocks
[INFO] finished tweaking git repo https://github.com/pentagolo/blocks
[INFO] tweaked toml for git repo https://github.com/pentagolo/blocks written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/pentagolo/blocks already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c048157b2d0e177925f40766ea73291fd283eba4422ebf0931e144a0d8dc0b80
[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" "c048157b2d0e177925f40766ea73291fd283eba4422ebf0931e144a0d8dc0b80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c048157b2d0e177925f40766ea73291fd283eba4422ebf0931e144a0d8dc0b80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c048157b2d0e177925f40766ea73291fd283eba4422ebf0931e144a0d8dc0b80", kill_on_drop: false }`
[INFO] [stdout] c048157b2d0e177925f40766ea73291fd283eba4422ebf0931e144a0d8dc0b80
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd782f91915e2e78ecd73e3ebdcfe999d2818ff9b0d445059835a2b597c9cfb7
[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" "dd782f91915e2e78ecd73e3ebdcfe999d2818ff9b0d445059835a2b597c9cfb7", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v0.8.20
[INFO] [stderr]    Compiling lazy_static v0.1.16
[INFO] [stderr]    Compiling pkg-config v0.3.8
[INFO] [stderr]    Compiling num_cpus v1.2.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.5
[INFO] [stderr]    Compiling shared_library v0.1.5
[INFO] [stderr]    Compiling phf_generator v0.7.20
[INFO] [stderr]    Compiling deque v0.3.1
[INFO] [stderr]    Compiling wayland-scanner v0.5.11
[INFO] [stderr]    Compiling glutin v0.6.2
[INFO] [stderr]    Compiling glium v0.15.0
[INFO] [stderr]    Compiling tempfile v2.1.4
[INFO] [stderr]    Compiling fs2 v0.2.5
[INFO] [stderr]    Compiling nalgebra v0.10.1
[INFO] [stderr]    Compiling memmap v0.2.3
[INFO] [stderr]    Compiling rayon v0.6.0
[INFO] [stderr]    Compiling phf_codegen v0.7.20
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling target_build_utils v0.1.2
[INFO] [stderr]    Compiling x11-dl v2.11.0
[INFO] [stderr]    Compiling backtrace v0.2.3
[INFO] [stderr]    Compiling wayland-client v0.5.12
[INFO] [stderr]    Compiling jpeg-decoder v0.1.11
[INFO] [stderr]    Compiling image v0.12.1
[INFO] [stderr]    Compiling serde_json v0.8.4
[INFO] [stderr]    Compiling libloading v0.3.1
[INFO] [stderr]    Compiling dlib v0.3.1
[INFO] [stderr]    Compiling wayland-sys v0.5.11
[INFO] [stderr]    Compiling wayland-window v0.2.3
[INFO] [stderr]    Compiling wayland-kbd v0.3.6
[INFO] [stderr]    Compiling blocks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/boxtree.rs:436:29
[INFO] [stdout]     |
[INFO] [stdout] 436 |                   let index = (
[INFO] [stdout]     |  _____________________________^
[INFO] [stdout] 437 | |                     ((pos.x & CHUNK_SIDE_MASK) as u16) << (0 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 438 | |                     |
[INFO] [stdout] 439 | |                     ((pos.y & CHUNK_SIDE_MASK) as u16) << (1 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 440 | |                     |
[INFO] [stdout] 441 | |                     ((pos.z & CHUNK_SIDE_MASK) as u16) << (2 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 442 | |                 );
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 436 |                 let index = 
[INFO] [stdout] 437 |                     ((pos.x & CHUNK_SIDE_MASK) as u16) << (0 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 438 |                     |
[INFO] [stdout] 439 |                     ((pos.y & CHUNK_SIDE_MASK) as u16) << (1 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 440 |                     |
[INFO] [stdout] 441 |                     ((pos.z & CHUNK_SIDE_MASK) as u16) << (2 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/boxtree.rs:480:25
[INFO] [stdout]     |
[INFO] [stdout] 480 |               let index = (
[INFO] [stdout]     |  _________________________^
[INFO] [stdout] 481 | |                 ((pos.x & CHUNK_SIDE_MASK) as u16) << (0 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 482 | |                 |
[INFO] [stdout] 483 | |                 ((pos.y & CHUNK_SIDE_MASK) as u16) << (1 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 484 | |                 |
[INFO] [stdout] 485 | |                 ((pos.z & CHUNK_SIDE_MASK) as u16) << (2 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 486 | |             );
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 480 |             let index = 
[INFO] [stdout] 481 |                 ((pos.x & CHUNK_SIDE_MASK) as u16) << (0 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 482 |                 |
[INFO] [stdout] 483 |                 ((pos.y & CHUNK_SIDE_MASK) as u16) << (1 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 484 |                 |
[INFO] [stdout] 485 |                 ((pos.z & CHUNK_SIDE_MASK) as u16) << (2 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/boxtree.rs:523:29
[INFO] [stdout]     |
[INFO] [stdout] 523 |                   let index = (
[INFO] [stdout]     |  _____________________________^
[INFO] [stdout] 524 | |                     ((pos.x & CHUNK_SIDE_MASK) as u16) << (0 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 525 | |                     |
[INFO] [stdout] 526 | |                     ((pos.y & CHUNK_SIDE_MASK) as u16) << (1 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 527 | |                     |
[INFO] [stdout] 528 | |                     ((pos.z & CHUNK_SIDE_MASK) as u16) << (2 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 529 | |                 );
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 523 |                 let index = 
[INFO] [stdout] 524 |                     ((pos.x & CHUNK_SIDE_MASK) as u16) << (0 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 525 |                     |
[INFO] [stdout] 526 |                     ((pos.y & CHUNK_SIDE_MASK) as u16) << (1 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout] 527 |                     |
[INFO] [stdout] 528 |                     ((pos.z & CHUNK_SIDE_MASK) as u16) << (2 * CHUNK_SIDE_LEN_LOG2)
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/boxtree.rs:643:28
[INFO] [stdout]     |
[INFO] [stdout] 643 |                   dists[i] = (
[INFO] [stdout]     |  ____________________________^
[INFO] [stdout] 644 | |                     (-origin.x * (deltas[i].x as f64)).ceil() as i64
[INFO] [stdout] 645 | |                     +
[INFO] [stdout] 646 | |                     (-origin.y * (deltas[i].y as f64)).ceil() as i64
[INFO] [stdout] 647 | |                     +
[INFO] [stdout] 648 | |                     (-origin.z * (deltas[i].z as f64)).ceil() as i64
[INFO] [stdout] 649 | |                 );
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 643 |                 dists[i] = 
[INFO] [stdout] 644 |                     (-origin.x * (deltas[i].x as f64)).ceil() as i64
[INFO] [stdout] 645 |                     +
[INFO] [stdout] 646 |                     (-origin.y * (deltas[i].y as f64)).ceil() as i64
[INFO] [stdout] 647 |                     +
[INFO] [stdout] 648 |                     (-origin.z * (deltas[i].z as f64)).ceil() as i64
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/boxtree.rs:662:24
[INFO] [stdout]     |
[INFO] [stdout] 662 |               dists[4] = (
[INFO] [stdout]     |  ________________________^
[INFO] [stdout] 663 | |                 (-origin.x * (deltas[4].x as f64)).ceil() as i64
[INFO] [stdout] 664 | |                 +
[INFO] [stdout] 665 | |                 (-origin.y * (deltas[4].y as f64)).ceil() as i64
[INFO] [stdout] ...   |
[INFO] [stdout] 669 | |                 ((dist * ((1 << 28) as f64)).ceil() as i64)
[INFO] [stdout] 670 | |             );
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 662 |             dists[4] = 
[INFO] [stdout] 663 |                 (-origin.x * (deltas[4].x as f64)).ceil() as i64
[INFO] [stdout] 664 |                 +
[INFO] [stdout] 665 |                 (-origin.y * (deltas[4].y as f64)).ceil() as i64
[INFO] [stdout] 666 |                 +
[INFO] [stdout] 667 |                 (-origin.z * (deltas[4].z as f64)).ceil() as i64
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `nalgebra as na`
[INFO] [stdout]  --> src/boxmodel.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use nalgebra as na;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `boxtree`
[INFO] [stdout]  --> src/boxmodel.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use boxtree;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufRead`, `Seek`
[INFO] [stdout]  --> src/boxmodel.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::{BufRead, Seek};
[INFO] [stdout]   |               ^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Cow`
[INFO] [stdout]  --> src/boxmodel.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::borrow::Cow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SystemTime`
[INFO] [stdout]   --> src/main.rs:15:36
[INFO] [stdout]    |
[INFO] [stdout] 15 | use std::time::{Duration, Instant, SystemTime};
[INFO] [stdout]    |                                    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/boxtree.rs:540:25
[INFO] [stdout]     |
[INFO] [stdout] 539 | ...       panic!("not jet supported {} {} {:b} {:b}", chunk, pos, orig_leaf.value, new_leaf.value);
[INFO] [stdout]     |           ----------------------------------------------------------------------------------------- any code following this expression is unreachable
[INFO] [stdout] 540 | ...       self.chunks_.get_unchecked_mut(chunk as usize).get_unchecked_mut(index as usize).set_surface(orig_leaf.is_surface());
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/boxtree.rs:544:34
[INFO] [stdout]     |
[INFO] [stdout] 543 |                         panic!("usage of transparent data not jet supported");
[INFO] [stdout]     |                         ------------------------------------------------------ any code following this expression is unreachable
[INFO] [stdout] 544 |                         for z in 0..5u32 {
[INFO] [stdout]     |                                  ^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:60:44
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let mut images = (0..256).map(|i| {
[INFO] [stdout]    |                                            ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `leaf`
[INFO] [stdout]    --> src/main.rs:115:98
[INFO] [stdout]     |
[INFO] [stdout] 115 |             box_tree.cast_view(origin, planes, max_dist as f64, &mut |box_pos: na::Vector3<u32>, leaf| {
[INFO] [stdout]     |                                                                                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_leaf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]   --> src/main.rs:22:32
[INFO] [stdout]    |
[INFO] [stdout] 22 | ...   fn compress(&mut self, pos: na::Vector3<u32>, depth: u8, chunk: &boxtree::Chunk<boxtree::HiddenLeaf>) -> Option<boxtree::HiddenLeaf> {
[INFO] [stdout]    |                              ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `depth`
[INFO] [stdout]   --> src/main.rs:22:55
[INFO] [stdout]    |
[INFO] [stdout] 22 | ...   fn compress(&mut self, pos: na::Vector3<u32>, depth: u8, chunk: &boxtree::Chunk<boxtree::HiddenLeaf>) -> Option<boxtree::HiddenLeaf> {
[INFO] [stdout]    |                                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_depth`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chunk`
[INFO] [stdout]   --> src/main.rs:22:66
[INFO] [stdout]    |
[INFO] [stdout] 22 | ... na::Vector3<u32>, depth: u8, chunk: &boxtree::Chunk<boxtree::HiddenLeaf>) -> Option<boxtree::HiddenLeaf> {
[INFO] [stdout]    |                                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_chunk`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]   --> src/main.rs:25:34
[INFO] [stdout]    |
[INFO] [stdout] 25 | ...   fn decompress(&mut self, pos: na::Vector3<u32>, depth: u8, leaf: boxtree::HiddenLeaf, chunk: &mut boxtree::Chunk<boxtree::HiddenLea...
[INFO] [stdout]    |                                ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `depth`
[INFO] [stdout]   --> src/main.rs:25:57
[INFO] [stdout]    |
[INFO] [stdout] 25 | ...   fn decompress(&mut self, pos: na::Vector3<u32>, depth: u8, leaf: boxtree::HiddenLeaf, chunk: &mut boxtree::Chunk<boxtree::HiddenLea...
[INFO] [stdout]    |                                                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_depth`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `leaf`
[INFO] [stdout]   --> src/main.rs:25:68
[INFO] [stdout]    |
[INFO] [stdout] 25 | ...: na::Vector3<u32>, depth: u8, leaf: boxtree::HiddenLeaf, chunk: &mut boxtree::Chunk<boxtree::HiddenLeaf>) {
[INFO] [stdout]    |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_leaf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chunk`
[INFO] [stdout]   --> src/main.rs:25:95
[INFO] [stdout]    |
[INFO] [stdout] 25 | ...8, leaf: boxtree::HiddenLeaf, chunk: &mut boxtree::Chunk<boxtree::HiddenLeaf>) {
[INFO] [stdout]    |                                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_chunk`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/boxtree.rs:455:43
[INFO] [stdout]     |
[INFO] [stdout] 455 |     pub unsafe fn neighbor_mut(&mut self, index: u16, mut pos: na::Vector3<u32>, dir: na::Vector3<u32>) -> &mut Child {
[INFO] [stdout]     |                                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]    --> src/boxtree.rs:617:39
[INFO] [stdout]     |
[INFO] [stdout] 617 |     pub fn set_void_at_pos(&mut self, pos: na::Vector3<u32>) {
[INFO] [stdout]     |                                       ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `norm`
[INFO] [stdout]    --> src/boxmodel.rs:164:21
[INFO] [stdout]     |
[INFO] [stdout] 164 |                 let norm = [pos[0] - 0.5, pos[1] - 0.5, pos[2] - 0.5];
[INFO] [stdout]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_norm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:96:9
[INFO] [stdout]    |
[INFO] [stdout] 96 |     let mut time = Instant::now();
[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] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:100:13
[INFO] [stdout]     |
[INFO] [stdout] 100 |         let mut per_instance = {
[INFO] [stdout]     |             ----^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:112:17
[INFO] [stdout]     |
[INFO] [stdout] 112 |             for mut p in planes.iter_mut() {
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/boxtree.rs:133:9
[INFO] [stdout]     |
[INFO] [stdout] 133 |         unsafe { self.set_box_spec_unmasked(box_spec & BOX_SPEC_BIT_MASK); }
[INFO] [stdout]     |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/boxtree.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |         unsafe { self.set_ext_spec_unmasked(ext_spec & (BOX_SPEC_BIT_MASK | SOLID_BIT_MASK)); }
[INFO] [stdout]     |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> src/boxtree.rs:151:9
[INFO] [stdout]     |
[INFO] [stdout] 151 |         unsafe { self.set_node_index_unmasked(node_index & NODE_INDEX_BIT_MASK); }
[INFO] [stdout]     |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `compression_`
[INFO] [stdout]    --> src/boxtree.rs:334:5
[INFO] [stdout]     |
[INFO] [stdout] 334 |     compression_: C,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit code: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-Wl,--eh-frame-hdr" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.blocks.1x04o46p-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288" "/opt/rustwide/target/debug/deps/blocks-cee0900d3d811288.5c2jzumko5y6brd1.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libimage-5d3ad11efb6cdb7c.rlib" "/opt/rustwide/target/debug/deps/libscoped_threadpool-8d51753ea40e61a6.rlib" "/opt/rustwide/target/debug/deps/libgif-803d0997bcea3ead.rlib" "/opt/rustwide/target/debug/deps/libcolor_quant-600b7866ce29c38c.rlib" "/opt/rustwide/target/debug/deps/liblzw-2bf98fa21fe9f912.rlib" "/opt/rustwide/target/debug/deps/libjpeg_decoder-c5cbbcaf9324138d.rlib" "/opt/rustwide/target/debug/deps/librayon-a511c774f8dad501.rlib" "/opt/rustwide/target/debug/deps/libnum_cpus-c27de3de5e5fe521.rlib" "/opt/rustwide/target/debug/deps/libdeque-9ce21c6e11386254.rlib" "/opt/rustwide/target/debug/deps/libpng-b9e492edd09e1c34.rlib" "/opt/rustwide/target/debug/deps/libdeflate-e26abaeed1c80078.rlib" "/opt/rustwide/target/debug/deps/libadler32-1ce742c8581a0cce.rlib" "/opt/rustwide/target/debug/deps/libinflate-7674b4890ee05ff6.rlib" "/opt/rustwide/target/debug/deps/libenum_primitive-41ab3128df3f05e5.rlib" "/opt/rustwide/target/debug/deps/libbyteorder-31786886a56aaab5.rlib" "/opt/rustwide/target/debug/deps/libnalgebra-3eac5370095ff2a5.rlib" "/opt/rustwide/target/debug/deps/libnum-ae7c8b39f6988e2b.rlib" "/opt/rustwide/target/debug/deps/libnum_rational-c1949806f7ae25dc.rlib" "/opt/rustwide/target/debug/deps/libnum_bigint-5284cc4136979616.rlib" "/opt/rustwide/target/debug/deps/libnum_complex-5e2d551991fe2dcb.rlib" "/opt/rustwide/target/debug/deps/libnum_iter-950821ccc006961f.rlib" "/opt/rustwide/target/debug/deps/libnum_integer-796502dbe365111a.rlib" "/opt/rustwide/target/debug/deps/libnum_traits-9b4027b6158eded1.rlib" "/opt/rustwide/target/debug/deps/librustc_serialize-5419d0ceabda1a5f.rlib" "/opt/rustwide/target/debug/deps/libglium-0cc8826a24ec2807.rlib" "/opt/rustwide/target/debug/deps/libglutin-adaf0ecc9763d2c3.rlib" "/opt/rustwide/target/debug/deps/libwayland_window-52cfc0328ccba89c.rlib" "/opt/rustwide/target/debug/deps/libtempfile-e595cf7f138cee81.rlib" "/opt/rustwide/target/debug/deps/librand-2d99607a3d571317.rlib" "/opt/rustwide/target/debug/deps/libbyteorder-6cddcccd56d44b5d.rlib" "/opt/rustwide/target/debug/deps/libwayland_kbd-bb0162843d13c0e7.rlib" "/opt/rustwide/target/debug/deps/libmemmap-6de00f4b6a73cb73.rlib" "/opt/rustwide/target/debug/deps/libosmesa_sys-b40cf11f71ec4219.rlib" "/opt/rustwide/target/debug/deps/libwayland_client-2bbdae5f057af7f6.rlib" "/opt/rustwide/target/debug/deps/libwayland_sys-46e304f69dbd2681.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-a620965283095e55.rlib" "/opt/rustwide/target/debug/deps/libdlib-a24b105d792fcfaa.rlib" "/opt/rustwide/target/debug/deps/liblibloading-77f7229ae64eca24.rlib" "/opt/rustwide/target/debug/deps/libcrossbeam-6b5170e65d5bab48.rlib" "/opt/rustwide/target/debug/deps/libbitflags-7b15d77b989f677d.rlib" "/opt/rustwide/target/debug/deps/libx11_dl-8ecf6e49345b5bd5.rlib" "/opt/rustwide/target/debug/deps/libshared_library-bf6872e2120a0041.rlib" "/opt/rustwide/target/debug/deps/libsmallvec-cacd07e96981e77a.rlib" "/opt/rustwide/target/debug/deps/libbacktrace-a5fe215a2c6770d9.rlib" "/opt/rustwide/target/debug/deps/libbacktrace_sys-a1a9b22b3342432d.rlib" "/opt/rustwide/target/debug/deps/librustc_demangle-bb1e9b9c91f65547.rlib" "/opt/rustwide/target/debug/deps/libcfg_if-e520603e5e391271.rlib" "/opt/rustwide/target/debug/deps/libdbghelp-a8e91854f2a89c0f.rlib" "/opt/rustwide/target/debug/deps/libwinapi-08f0135bab856b5b.rlib" "/opt/rustwide/target/debug/deps/libkernel32-cceb62b1a55bf6d7.rlib" "/opt/rustwide/target/debug/deps/liblibc-ccaf77f648b5094b.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-4742f6ccc7d0ed2b.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-d66e0ceb8eaec9b8.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-9717ec0599b569a0.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-04369de9ba916647.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-997d622c2e4dbe5c.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-0359c4288a5ef89f.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-1b25ede22d698ab3.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-37940b486a68e488.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-06b77c27e794c7c6.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-4d07e02a8df36da1.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-fb29e0695c0a0f79.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-e16188b4cf97e8bb.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-5eb391c8dabdee77.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-b0689b528b222bee.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/beta-2020-07-24-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-ed072ac495e62e7a.rlib" "-Wl,-Bdynamic" "-ldl" "-ldl" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-ldl" "-lutil"
[INFO] [stdout]   = note: /usr/bin/ld: /opt/rustwide/target/debug/deps/libbacktrace-a5fe215a2c6770d9.rlib(backtrace-a5fe215a2c6770d9.backtrace.8a1zdjc9-cgu.12.rcgu.o): in function `backtrace::symbolize::libbacktrace::init_state::{{closure}}':
[INFO] [stdout]           /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/backtrace-0.2.3/src/symbolize/libbacktrace.rs:150: undefined reference to `backtrace_create_state'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libbacktrace-a5fe215a2c6770d9.rlib(backtrace-a5fe215a2c6770d9.backtrace.8a1zdjc9-cgu.12.rcgu.o): in function `backtrace::symbolize::libbacktrace::resolve':
[INFO] [stdout]           /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/backtrace-0.2.3/src/symbolize/libbacktrace.rs:167: undefined reference to `backtrace_pcinfo'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/backtrace-0.2.3/src/symbolize/libbacktrace.rs:171: undefined reference to `backtrace_syminfo'
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `blocks`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "dd782f91915e2e78ecd73e3ebdcfe999d2818ff9b0d445059835a2b597c9cfb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd782f91915e2e78ecd73e3ebdcfe999d2818ff9b0d445059835a2b597c9cfb7", kill_on_drop: false }`
[INFO] [stdout] dd782f91915e2e78ecd73e3ebdcfe999d2818ff9b0d445059835a2b597c9cfb7