[INFO] updating cached repository https://github.com/marty777/adventofcode2019
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0329d843a001339ec2912f7782e623d5536e60bd
[INFO] checking marty777/adventofcode2019 against try#f149601db42efe10ece8b284ab681fd4a6fcb89c for pr-68766
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarty777%2Fadventofcode2019" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/marty777/adventofcode2019 on toolchain f149601db42efe10ece8b284ab681fd4a6fcb89c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/marty777/adventofcode2019
[INFO] finished tweaking git repo https://github.com/marty777/adventofcode2019
[INFO] tweaked toml for git repo https://github.com/marty777/adventofcode2019 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/marty777/adventofcode2019 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=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" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1d82b0f479bb6735d21499b2e6ded183413154445df73b638dac7172feb00620
[INFO] running `"docker" "start" "-a" "1d82b0f479bb6735d21499b2e6ded183413154445df73b638dac7172feb00620"`
[INFO] [stderr]     Checking adventofcode2019 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/day18.rs:157:6
[INFO] [stderr]     |
[INFO] [stderr] 157 |     for i in 0..start_nodes.len() {
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `len` is never read
[INFO] [stderr]    --> src/day18.rs:888:11
[INFO] [stderr]     |
[INFO] [stderr] 888 |         let mut len = 0;
[INFO] [stderr]     |                 ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/day18.rs:157:6
[INFO] [stderr]     |
[INFO] [stderr] 157 |     for i in 0..start_nodes.len() {
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `len` is never read
[INFO] [stderr]    --> src/day18.rs:888:11
[INFO] [stderr]     |
[INFO] [stderr] 888 |         let mut len = 0;
[INFO] [stderr]     |                 ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `copy_mazegrid`
[INFO] [stderr]   --> src/day18.rs:42:4
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn copy_mazegrid(src:&mut MazeGrid, dest:&mut MazeGrid) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ElementPosition`
[INFO] [stderr]   --> src/day18.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | struct ElementPosition {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `path_includes_door`
[INFO] [stderr]    --> src/day18.rs:254:4
[INFO] [stderr]     |
[INFO] [stderr] 254 | fn path_includes_door(grid:&mut MazeGrid, path:&Vec<Coord>, verbose:bool)->bool {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `key_steps_recurse`
[INFO] [stderr]    --> src/day18.rs:271:4
[INFO] [stderr]     |
[INFO] [stderr] 271 | fn key_steps_recurse(keys:&Vec<ElementPosition>, id:u8)->usize {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_keys_recurse`
[INFO] [stderr]    --> src/day18.rs:437:4
[INFO] [stderr]     |
[INFO] [stderr] 437 | fn get_keys_recurse(grid: &mut MazeGrid, steps:usize, position:Coord)->usize {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_keys`
[INFO] [stderr]    --> src/day18.rs:566:4
[INFO] [stderr]     |
[INFO] [stderr] 566 | fn get_keys(grid:&mut MazeGrid)->usize {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cmp_element_position2`
[INFO] [stderr]    --> src/day18.rs:775:4
[INFO] [stderr]     |
[INFO] [stderr] 775 | fn cmp_element_position2(a:&ElementPosition, b:&ElementPosition)->Ordering {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cmp_element_position`
[INFO] [stderr]    --> src/day18.rs:804:4
[INFO] [stderr]     |
[INFO] [stderr] 804 | fn cmp_element_position(a:&ElementPosition, b:&ElementPosition)->Ordering {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `copy_mazegrid`
[INFO] [stderr]   --> src/day18.rs:42:4
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn copy_mazegrid(src:&mut MazeGrid, dest:&mut MazeGrid) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ElementPosition`
[INFO] [stderr]   --> src/day18.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | struct ElementPosition {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `path_includes_door`
[INFO] [stderr]    --> src/day18.rs:254:4
[INFO] [stderr]     |
[INFO] [stderr] 254 | fn path_includes_door(grid:&mut MazeGrid, path:&Vec<Coord>, verbose:bool)->bool {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `key_steps_recurse`
[INFO] [stderr]    --> src/day18.rs:271:4
[INFO] [stderr]     |
[INFO] [stderr] 271 | fn key_steps_recurse(keys:&Vec<ElementPosition>, id:u8)->usize {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_keys_recurse`
[INFO] [stderr]    --> src/day18.rs:437:4
[INFO] [stderr]     |
[INFO] [stderr] 437 | fn get_keys_recurse(grid: &mut MazeGrid, steps:usize, position:Coord)->usize {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_keys`
[INFO] [stderr]    --> src/day18.rs:566:4
[INFO] [stderr]     |
[INFO] [stderr] 566 | fn get_keys(grid:&mut MazeGrid)->usize {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cmp_element_position2`
[INFO] [stderr]    --> src/day18.rs:775:4
[INFO] [stderr]     |
[INFO] [stderr] 775 | fn cmp_element_position2(a:&ElementPosition, b:&ElementPosition)->Ordering {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cmp_element_position`
[INFO] [stderr]    --> src/day18.rs:804:4
[INFO] [stderr]     |
[INFO] [stderr] 804 | fn cmp_element_position(a:&ElementPosition, b:&ElementPosition)->Ordering {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.58s
[INFO] running `"docker" "inspect" "1d82b0f479bb6735d21499b2e6ded183413154445df73b638dac7172feb00620"`
[INFO] running `"docker" "rm" "-f" "1d82b0f479bb6735d21499b2e6ded183413154445df73b638dac7172feb00620"`
[INFO] [stdout] 1d82b0f479bb6735d21499b2e6ded183413154445df73b638dac7172feb00620