[INFO] cloning repository https://github.com/queuedq/exact-cover-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/queuedq/exact-cover-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqueuedq%2Fexact-cover-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqueuedq%2Fexact-cover-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 44dd225b183f99ac14108443b8ef7b52377c0704
[INFO] testing queuedq/exact-cover-rs against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqueuedq%2Fexact-cover-rs" "/workspace/builds/worker-69/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-69/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/queuedq/exact-cover-rs on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/queuedq/exact-cover-rs
[INFO] finished tweaking git repo https://github.com/queuedq/exact-cover-rs
[INFO] tweaked toml for git repo https://github.com/queuedq/exact-cover-rs written to /workspace/builds/worker-69/source/Cargo.toml
[INFO] crate git repo https://github.com/queuedq/exact-cover-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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-69/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0aabd8054068894e4cfdce50284c61ae0ef86df7cfdc7858b82695f221ddb53b
[INFO] running `Command { std: "docker" "start" "-a" "0aabd8054068894e4cfdce50284c61ae0ef86df7cfdc7858b82695f221ddb53b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0aabd8054068894e4cfdce50284c61ae0ef86df7cfdc7858b82695f221ddb53b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0aabd8054068894e4cfdce50284c61ae0ef86df7cfdc7858b82695f221ddb53b", kill_on_drop: false }`
[INFO] [stdout] 0aabd8054068894e4cfdce50284c61ae0ef86df7cfdc7858b82695f221ddb53b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 456f83ab4e5dbe03bd01dd1a5e3e13223d2d26a1e1218a84498254fa408c85ef
[INFO] running `Command { std: "docker" "start" "-a" "456f83ab4e5dbe03bd01dd1a5e3e13223d2d26a1e1218a84498254fa408c85ef", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling futures-core v0.3.18
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling futures-channel v0.3.18
[INFO] [stderr]    Compiling futures-task v0.3.18
[INFO] [stderr]    Compiling futures-sink v0.3.18
[INFO] [stderr]    Compiling futures-util v0.3.18
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling futures-io v0.3.18
[INFO] [stderr]    Compiling slab v0.4.5
[INFO] [stderr]    Compiling pin-project-lite v0.2.7
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling futures-macro v0.3.18
[INFO] [stderr]    Compiling futures-executor v0.3.18
[INFO] [stderr]    Compiling futures v0.3.18
[INFO] [stderr]    Compiling exact-cover v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `Aborted`
[INFO] [stdout]   --> src/solver.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Aborted(Matrix),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.34s
[INFO] running `Command { std: "docker" "inspect" "456f83ab4e5dbe03bd01dd1a5e3e13223d2d26a1e1218a84498254fa408c85ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "456f83ab4e5dbe03bd01dd1a5e3e13223d2d26a1e1218a84498254fa408c85ef", kill_on_drop: false }`
[INFO] [stdout] 456f83ab4e5dbe03bd01dd1a5e3e13223d2d26a1e1218a84498254fa408c85ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 386007fec60f09ca2278db4b442b71de77a1c19a3f4b566b617ab722bcc7876a
[INFO] running `Command { std: "docker" "start" "-a" "386007fec60f09ca2278db4b442b71de77a1c19a3f4b566b617ab722bcc7876a", kill_on_drop: false }`
[INFO] [stderr]    Compiling exact-cover v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `Aborted`
[INFO] [stdout]   --> src/solver.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Aborted(Matrix),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/dlx.rs:231:9
[INFO] [stdout]     |
[INFO] [stdout] 231 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Aborted`
[INFO] [stdout]   --> src/solver.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Aborted(Matrix),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 7.77s
[INFO] running `Command { std: "docker" "inspect" "386007fec60f09ca2278db4b442b71de77a1c19a3f4b566b617ab722bcc7876a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "386007fec60f09ca2278db4b442b71de77a1c19a3f4b566b617ab722bcc7876a", kill_on_drop: false }`
[INFO] [stdout] 386007fec60f09ca2278db4b442b71de77a1c19a3f4b566b617ab722bcc7876a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d91041a99f7882bc42304650f46974ceb6a334dfe3e9abdb6ce9d5ff8e55905b
[INFO] running `Command { std: "docker" "start" "-a" "d91041a99f7882bc42304650f46974ceb6a334dfe3e9abdb6ce9d5ff8e55905b", kill_on_drop: false }`
[INFO] [stderr] warning: variant is never constructed: `Aborted`
[INFO] [stderr]   --> src/solver.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     Aborted(Matrix),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/dlx.rs:231:9
[INFO] [stderr]     |
[INFO] [stderr] 231 |     use super::*;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `exact-cover` (lib) generated 1 warning
[INFO] [stderr] warning: `exact-cover` (lib test) generated 2 warnings (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/exact_cover-4dbdb5b57e681e14)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test dlx::tests::matrix_search_should_solve_exact_cover ... ok
[INFO] [stdout] test problem::tests::problem_can_be_created ... ok
[INFO] [stdout] test solver::tests::solver_can_solve_problem ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests exact-cover
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d91041a99f7882bc42304650f46974ceb6a334dfe3e9abdb6ce9d5ff8e55905b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d91041a99f7882bc42304650f46974ceb6a334dfe3e9abdb6ce9d5ff8e55905b", kill_on_drop: false }`
[INFO] [stdout] d91041a99f7882bc42304650f46974ceb6a334dfe3e9abdb6ce9d5ff8e55905b