[INFO] updating cached repository https://github.com/romatthe/tracer-tong
[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] 8c7c26c7addaf44e617285c94f2491cedbd79292
[INFO] checking romatthe/tracer-tong against master#783139bd8fc3b94fac9a1bf81bba2c506e8221b6 for pr-72644
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fromatthe%2Ftracer-tong" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/romatthe/tracer-tong on toolchain 783139bd8fc3b94fac9a1bf81bba2c506e8221b6
[INFO] running `"/workspace/cargo-home/bin/cargo" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/romatthe/tracer-tong
[INFO] finished tweaking git repo https://github.com/romatthe/tracer-tong
[INFO] tweaked toml for git repo https://github.com/romatthe/tracer-tong written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/romatthe/tracer-tong already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "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] b051a59d566845b84c76a1a59db1089a121dd6f17446d0748861d842ed95fd89
[INFO] running `"docker" "start" "-a" "b051a59d566845b84c76a1a59db1089a121dd6f17446d0748861d842ed95fd89"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking tracer-tong v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::ops::Mul`
[INFO] [stderr]  --> src/core/matrix.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::ops::Mul;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `vector`
[INFO] [stderr]  --> src/core/matrix.rs:3:33
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::core::tuple::{Tuple, vector};
[INFO] [stderr]   |                                 ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::env::current_exe`
[INFO] [stderr]  --> src/core/matrix.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::env::current_exe;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Mul`
[INFO] [stderr]  --> src/core/matrix.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::ops::Mul;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `vector`
[INFO] [stderr]  --> src/core/matrix.rs:3:33
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::core::tuple::{Tuple, vector};
[INFO] [stderr]   |                                 ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::env::current_exe`
[INFO] [stderr]  --> src/core/matrix.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::env::current_exe;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `point`, `vector`
[INFO] [stderr]    --> src/core/matrix.rs:246:30
[INFO] [stderr]     |
[INFO] [stderr] 246 |     use crate::core::tuple::{vector, point};
[INFO] [stderr]     |                              ^^^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/core/matrix.rs:165:30
[INFO] [stderr]     |
[INFO] [stderr] 165 |     pub fn sub_matrix(&self, x: usize, y: usize) -> Matrix3x3 {
[INFO] [stderr]     |                              ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]    --> src/core/matrix.rs:165:40
[INFO] [stderr]     |
[INFO] [stderr] 165 |     pub fn sub_matrix(&self, x: usize, y: usize) -> Matrix3x3 {
[INFO] [stderr]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/core/matrix.rs:166:13
[INFO] [stderr]     |
[INFO] [stderr] 166 |         let mut sub = Matrix3x3::new();
[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: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/core/matrix.rs:165:30
[INFO] [stderr]     |
[INFO] [stderr] 165 |     pub fn sub_matrix(&self, x: usize, y: usize) -> Matrix3x3 {
[INFO] [stderr]     |                              ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]    --> src/core/matrix.rs:165:40
[INFO] [stderr]     |
[INFO] [stderr] 165 |     pub fn sub_matrix(&self, x: usize, y: usize) -> Matrix3x3 {
[INFO] [stderr]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/core/matrix.rs:166:13
[INFO] [stderr]     |
[INFO] [stderr] 166 |         let mut sub = Matrix3x3::new();
[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: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `"docker" "inspect" "b051a59d566845b84c76a1a59db1089a121dd6f17446d0748861d842ed95fd89"`
[INFO] running `"docker" "rm" "-f" "b051a59d566845b84c76a1a59db1089a121dd6f17446d0748861d842ed95fd89"`
[INFO] [stdout] b051a59d566845b84c76a1a59db1089a121dd6f17446d0748861d842ed95fd89