Dec 15 16:46:35.292 INFO testing dlx-0.1.0 against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 15 16:46:35.292 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 15 16:46:35.910 INFO [stdout] 3c431914cb4a97bcea3a93906f7464181a8419bb820c96d1325dc48373e7a0fe
Dec 15 16:46:35.915 INFO running `"docker" "start" "-a" "3c431914cb4a97bcea3a93906f7464181a8419bb820c96d1325dc48373e7a0fe"`
Dec 15 16:46:36.592 INFO [stderr] usermod: no changes
Dec 15 16:46:36.639 INFO [stderr]    Compiling dlx v0.1.0 (/source)
Dec 15 16:46:37.394 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
Dec 15 16:46:37.396 INFO [stderr] su: No module specific data is present
Dec 15 16:46:37.695 INFO running `"docker" "inspect" "3c431914cb4a97bcea3a93906f7464181a8419bb820c96d1325dc48373e7a0fe"`
Dec 15 16:46:37.772 INFO running `"docker" "rm" "-f" "3c431914cb4a97bcea3a93906f7464181a8419bb820c96d1325dc48373e7a0fe"`
Dec 15 16:46:37.899 INFO [stdout] 3c431914cb4a97bcea3a93906f7464181a8419bb820c96d1325dc48373e7a0fe
Dec 15 16:46:37.907 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 15 16:46:38.179 INFO [stdout] 39de71d1cb9c0be52fe32e2222866768ae02702ba2544e8b2328aa6ce01211da
Dec 15 16:46:38.181 INFO running `"docker" "start" "-a" "39de71d1cb9c0be52fe32e2222866768ae02702ba2544e8b2328aa6ce01211da"`
Dec 15 16:46:38.890 INFO [stderr] usermod: no changes
Dec 15 16:46:38.920 INFO [stderr]    Compiling dlx v0.1.0 (/source)
Dec 15 16:46:39.441 INFO [stderr] warning: doc comment not used by rustdoc
Dec 15 16:46:39.441 INFO [stderr]   --> examples/sudoku.rs:91:9
Dec 15 16:46:39.441 INFO [stderr]    |
Dec 15 16:46:39.441 INFO [stderr] 91 |         /// Convert the rows from the exact cover matrix into a
Dec 15 16:46:39.441 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 16:46:39.441 INFO [stderr]    |
Dec 15 16:46:39.441 INFO [stderr]    = note: #[warn(unused_doc_comments)] on by default
Dec 15 16:46:39.441 INFO [stderr] 
Dec 15 16:46:39.992 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
Dec 15 16:46:39.993 INFO [stderr] su: No module specific data is present
Dec 15 16:46:40.385 INFO running `"docker" "inspect" "39de71d1cb9c0be52fe32e2222866768ae02702ba2544e8b2328aa6ce01211da"`
Dec 15 16:46:40.488 INFO running `"docker" "rm" "-f" "39de71d1cb9c0be52fe32e2222866768ae02702ba2544e8b2328aa6ce01211da"`
Dec 15 16:46:40.584 INFO [stdout] 39de71d1cb9c0be52fe32e2222866768ae02702ba2544e8b2328aa6ce01211da
Dec 15 16:46:40.586 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 15 16:46:40.805 INFO [stdout] 558230bbb6d703a361b0548621fd2b5eb85fc9899c440916ddc838a219ad294e
Dec 15 16:46:40.807 INFO running `"docker" "start" "-a" "558230bbb6d703a361b0548621fd2b5eb85fc9899c440916ddc838a219ad294e"`
Dec 15 16:46:41.205 INFO [stderr] usermod: no changes
Dec 15 16:46:41.238 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Dec 15 16:46:41.242 INFO [stderr]      Running /target/debug/deps/dlx-cd09ee30a6dc8a6e
Dec 15 16:46:41.244 INFO [stdout] 
Dec 15 16:46:41.244 INFO [stdout] running 0 tests
Dec 15 16:46:41.244 INFO [stdout] 
Dec 15 16:46:41.244 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 15 16:46:41.244 INFO [stdout] 
Dec 15 16:46:41.245 INFO [stderr]    Doc-tests dlx
Dec 15 16:46:42.230 INFO [stdout] 
Dec 15 16:46:42.230 INFO [stdout] running 0 tests
Dec 15 16:46:42.230 INFO [stdout] 
Dec 15 16:46:42.230 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 15 16:46:42.230 INFO [stdout] 
Dec 15 16:46:42.239 INFO [stderr] su: No module specific data is present
Dec 15 16:46:42.639 INFO running `"docker" "inspect" "558230bbb6d703a361b0548621fd2b5eb85fc9899c440916ddc838a219ad294e"`
Dec 15 16:46:42.773 INFO running `"docker" "rm" "-f" "558230bbb6d703a361b0548621fd2b5eb85fc9899c440916ddc838a219ad294e"`
Dec 15 16:46:42.858 INFO [stdout] 558230bbb6d703a361b0548621fd2b5eb85fc9899c440916ddc838a219ad294e