[INFO] fetching crate waifu 0.1.0...
[INFO] building waifu-0.1.0 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate waifu 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate waifu 0.1.0
[INFO] finished tweaking crates.io crate waifu 0.1.0
[INFO] tweaked toml for crates.io crate waifu 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate waifu 0.1.0 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 10 packages to latest compatible versions
[INFO] [stderr]       Adding ndarray v0.15.6 (available: v0.16.1)
[INFO] [stderr]       Adding pretty_assertions v0.3.4 (available: v1.4.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 33123658cb12eec0888efa1c5b4fbd9340c317cf18477cb6dcde923444499672
[INFO] running `Command { std: "docker" "start" "-a" "33123658cb12eec0888efa1c5b4fbd9340c317cf18477cb6dcde923444499672", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33123658cb12eec0888efa1c5b4fbd9340c317cf18477cb6dcde923444499672", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33123658cb12eec0888efa1c5b4fbd9340c317cf18477cb6dcde923444499672", kill_on_drop: false }`
[INFO] [stdout] 33123658cb12eec0888efa1c5b4fbd9340c317cf18477cb6dcde923444499672
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f013ac0dd9a976e153d12d620c17b9ce20e71411784d5dbb099bd3fcff596139
[INFO] running `Command { std: "docker" "start" "-a" "f013ac0dd9a976e153d12d620c17b9ce20e71411784d5dbb099bd3fcff596139", kill_on_drop: false }`
[INFO] [stderr]    Compiling waifu v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/solvers/state2.rs:150:6
[INFO] [stdout]     |
[INFO] [stdout] 150 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/solvers/state2.rs:162:6
[INFO] [stdout]     |
[INFO] [stdout] 162 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Level` is never used
[INFO] [stdout]  --> src/solvers/state2.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Level {
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `sx`, `sy`, and `level` are never read
[INFO] [stdout]   --> src/solvers/state2.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct StructLevel {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 11 |     sx: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 12 |     sy: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 13 |     level: Vec<Vec<usize>>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StructLevel` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]   --> src/solvers/state2.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 | pub fn solve(level: &StructLevel) -> Option<Vec<(usize, usize)>> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gauss_jordan_zf2` is never used
[INFO] [stdout]    --> src/solvers/state2.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn gauss_jordan_zf2(mat: Vec<Vec<usize>>, expected: Vec<usize>) -> Option<Vec<usize>> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "f013ac0dd9a976e153d12d620c17b9ce20e71411784d5dbb099bd3fcff596139", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f013ac0dd9a976e153d12d620c17b9ce20e71411784d5dbb099bd3fcff596139", kill_on_drop: false }`
[INFO] [stdout] f013ac0dd9a976e153d12d620c17b9ce20e71411784d5dbb099bd3fcff596139
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 24cecc44b260078996cac58222d21c9525446cb50f3e0f53ae5b19b60fe4a362
[INFO] running `Command { std: "docker" "start" "-a" "24cecc44b260078996cac58222d21c9525446cb50f3e0f53ae5b19b60fe4a362", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling matrixmultiply v0.3.10
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling ansi_term v0.9.0
[INFO] [stderr]    Compiling difference v1.0.0
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/solvers/state2.rs:150:6
[INFO] [stdout]     |
[INFO] [stdout] 150 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/solvers/state2.rs:162:6
[INFO] [stdout]     |
[INFO] [stdout] 162 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Level` is never used
[INFO] [stdout]  --> src/solvers/state2.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Level {
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `sx`, `sy`, and `level` are never read
[INFO] [stdout]   --> src/solvers/state2.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct StructLevel {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 11 |     sx: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 12 |     sy: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 13 |     level: Vec<Vec<usize>>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StructLevel` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]   --> src/solvers/state2.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 | pub fn solve(level: &StructLevel) -> Option<Vec<(usize, usize)>> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gauss_jordan_zf2` is never used
[INFO] [stdout]    --> src/solvers/state2.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn gauss_jordan_zf2(mat: Vec<Vec<usize>>, expected: Vec<usize>) -> Option<Vec<usize>> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling pretty_assertions v0.3.4
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling ndarray v0.15.6
[INFO] [stderr]    Compiling waifu v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/solvers/state2.rs:150:6
[INFO] [stdout]     |
[INFO] [stdout] 150 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/solvers/state2.rs:162:6
[INFO] [stdout]     |
[INFO] [stdout] 162 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_solved` is never used
[INFO] [stdout]  --> src/solvers/state2.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Level {
[INFO] [stdout]   |           ----- method in this trait
[INFO] [stdout] 2 |     fn size(&self) -> (usize, usize);
[INFO] [stdout] 3 |     fn is_solved(&self) -> bool;
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 6.98s
[INFO] running `Command { std: "docker" "inspect" "24cecc44b260078996cac58222d21c9525446cb50f3e0f53ae5b19b60fe4a362", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24cecc44b260078996cac58222d21c9525446cb50f3e0f53ae5b19b60fe4a362", kill_on_drop: false }`
[INFO] [stdout] 24cecc44b260078996cac58222d21c9525446cb50f3e0f53ae5b19b60fe4a362