[INFO] cloning repository https://github.com/ahouts/math166-assignment2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ahouts/math166-assignment2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fahouts%2Fmath166-assignment2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fahouts%2Fmath166-assignment2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4a89187ef91f6b75d3c9e649207e8b1b98a8efbc
[INFO] checking ahouts/math166-assignment2 against master#ba7e63b63871a429533c189adbfb1d9a6337e000 for pr-135331-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fahouts%2Fmath166-assignment2" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ahouts/math166-assignment2
[INFO] finished tweaking git repo https://github.com/ahouts/math166-assignment2
[INFO] tweaked toml for git repo https://github.com/ahouts/math166-assignment2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ahouts/math166-assignment2 on toolchain ba7e63b63871a429533c189adbfb1d9a6337e000
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ba7e63b63871a429533c189adbfb1d9a6337e000" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ahouts/math166-assignment2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ba7e63b63871a429533c189adbfb1d9a6337e000" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+ba7e63b63871a429533c189adbfb1d9a6337e000" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 78a43e0e2497fbe82e36dc89e3d88b50551322c35ccc2637c9a5bfaab5e5e276
[INFO] running `Command { std: "docker" "start" "-a" "78a43e0e2497fbe82e36dc89e3d88b50551322c35ccc2637c9a5bfaab5e5e276", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78a43e0e2497fbe82e36dc89e3d88b50551322c35ccc2637c9a5bfaab5e5e276", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78a43e0e2497fbe82e36dc89e3d88b50551322c35ccc2637c9a5bfaab5e5e276", kill_on_drop: false }`
[INFO] [stdout] 78a43e0e2497fbe82e36dc89e3d88b50551322c35ccc2637c9a5bfaab5e5e276
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+ba7e63b63871a429533c189adbfb1d9a6337e000" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f906546c4ddf2d7b155541e63f9d6f9c3636cdb6ed1ace864f243fa7e5a47f5
[INFO] running `Command { std: "docker" "start" "-a" "5f906546c4ddf2d7b155541e63f9d6f9c3636cdb6ed1ace864f243fa7e5a47f5", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.3
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking math166-assignment2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `ReverseSub` is never constructed
[INFO] [stdout]   --> src/mat_eqn_solver.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct ReverseSub<T: UpperTriangle> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ReverseSub` is never constructed
[INFO] [stdout]   --> src/mat_eqn_solver.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct ReverseSub<T: UpperTriangle> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.77s
[INFO] running `Command { std: "docker" "inspect" "5f906546c4ddf2d7b155541e63f9d6f9c3636cdb6ed1ace864f243fa7e5a47f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f906546c4ddf2d7b155541e63f9d6f9c3636cdb6ed1ace864f243fa7e5a47f5", kill_on_drop: false }`
[INFO] [stdout] 5f906546c4ddf2d7b155541e63f9d6f9c3636cdb6ed1ace864f243fa7e5a47f5