[INFO] updating cached repository ahouts/math166-assignment2
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ahouts/math166-assignment2
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ahouts/math166-assignment2" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ahouts/math166-assignment2"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ahouts/math166-assignment2'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ahouts/math166-assignment2" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ahouts/math166-assignment2"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ahouts/math166-assignment2'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4a89187ef91f6b75d3c9e649207e8b1b98a8efbc
[INFO] sha for GitHub repo ahouts/math166-assignment2: 4a89187ef91f6b75d3c9e649207e8b1b98a8efbc
[INFO] validating manifest of ahouts/math166-assignment2 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ahouts/math166-assignment2 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ahouts/math166-assignment2
[INFO] finished frobbing ahouts/math166-assignment2
[INFO] frobbed toml for ahouts/math166-assignment2 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ahouts/math166-assignment2/Cargo.toml
[INFO] started frobbing ahouts/math166-assignment2
[INFO] finished frobbing ahouts/math166-assignment2
[INFO] frobbed toml for ahouts/math166-assignment2 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ahouts/math166-assignment2/Cargo.toml
[INFO] crate ahouts/math166-assignment2 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking ahouts/math166-assignment2 against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-4/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ahouts/math166-assignment2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4cd48b054780897e3d204bb800cffb96d586df14ade40772d400319789aeef9b
[INFO] running `"docker" "start" "-a" "4cd48b054780897e3d204bb800cffb96d586df14ade40772d400319789aeef9b"`
[INFO] [stderr]     Checking math166-assignment2 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `ReverseSub`
[INFO] [stderr]   --> src/mat_eqn_solver.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub struct ReverseSub<T: UpperTriangle> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ReverseSub`
[INFO] [stderr]   --> src/mat_eqn_solver.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub struct ReverseSub<T: UpperTriangle> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.67s
[INFO] running `"docker" "inspect" "4cd48b054780897e3d204bb800cffb96d586df14ade40772d400319789aeef9b"`
[INFO] running `"docker" "rm" "-f" "4cd48b054780897e3d204bb800cffb96d586df14ade40772d400319789aeef9b"`
[INFO] [stdout] 4cd48b054780897e3d204bb800cffb96d586df14ade40772d400319789aeef9b