[INFO] cloning repository https://github.com/JoelBookey/sudoku.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JoelBookey/sudoku.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoelBookey%2Fsudoku.rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoelBookey%2Fsudoku.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 37db0880ffc9c5f262780a8f7ffcb4be2f32dc6f
[INFO] testing JoelBookey/sudoku.rs against master#f9988fefd3add01f414f52b414308e7872622fee for pr-155114
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoelBookey%2Fsudoku.rs" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/JoelBookey/sudoku.rs
[INFO] finished tweaking git repo https://github.com/JoelBookey/sudoku.rs
[INFO] tweaked toml for git repo https://github.com/JoelBookey/sudoku.rs written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/JoelBookey/sudoku.rs on toolchain f9988fefd3add01f414f52b414308e7872622fee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9988fefd3add01f414f52b414308e7872622fee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/JoelBookey/sudoku.rs 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" "+f9988fefd3add01f414f52b414308e7872622fee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap_builder v4.3.8
[INFO] [stderr]   Downloaded anstyle v1.0.1
[INFO] [stderr]   Downloaded getrandom v0.2.10
[INFO] [stderr]   Downloaded anstyle-parse v0.2.1
[INFO] [stderr]   Downloaded clap v4.3.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+f9988fefd3add01f414f52b414308e7872622fee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd6a43d820f9e32f1ca383fa4f4863c585ed3be257d3785057dc151312d7ca71
[INFO] running `Command { std: "docker" "start" "-a" "bd6a43d820f9e32f1ca383fa4f4863c585ed3be257d3785057dc151312d7ca71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd6a43d820f9e32f1ca383fa4f4863c585ed3be257d3785057dc151312d7ca71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd6a43d820f9e32f1ca383fa4f4863c585ed3be257d3785057dc151312d7ca71", kill_on_drop: false }`
[INFO] [stdout] bd6a43d820f9e32f1ca383fa4f4863c585ed3be257d3785057dc151312d7ca71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+f9988fefd3add01f414f52b414308e7872622fee" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fb41af78d3457540a6c668c4ea439b8abdabc2d0230832cbae607d82550cd42c
[INFO] running `Command { std: "docker" "start" "-a" "fb41af78d3457540a6c668c4ea439b8abdabc2d0230832cbae607d82550cd42c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling proc-macro2 v1.0.60
[INFO] [stderr]    Compiling rustix v0.37.20
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling linux-raw-sys v0.3.8
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling utf8parse v0.2.1
[INFO] [stderr]    Compiling anstyle v1.0.1
[INFO] [stderr]    Compiling anstyle-query v1.0.0
[INFO] [stderr]    Compiling colorchoice v1.0.0
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling clap_lex v0.5.0
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling once_cell v1.18.0
[INFO] [stderr]    Compiling anstyle-parse v0.2.1
[INFO] [stderr]    Compiling getrandom v0.2.10
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling is-terminal v0.4.7
[INFO] [stderr]    Compiling anstream v0.3.2
[INFO] [stderr]    Compiling clap_builder v4.3.8
[INFO] [stderr]    Compiling clap_derive v4.3.2
[INFO] [stderr]    Compiling clap v4.3.8
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.88s
[INFO] running `Command { std: "docker" "inspect" "fb41af78d3457540a6c668c4ea439b8abdabc2d0230832cbae607d82550cd42c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb41af78d3457540a6c668c4ea439b8abdabc2d0230832cbae607d82550cd42c", kill_on_drop: false }`
[INFO] [stdout] fb41af78d3457540a6c668c4ea439b8abdabc2d0230832cbae607d82550cd42c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+f9988fefd3add01f414f52b414308e7872622fee" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1873a535545889ec192bf05a38717b094ed641e52463204e0b3684b8bc1acc4e
[INFO] running `Command { std: "docker" "start" "-a" "1873a535545889ec192bf05a38717b094ed641e52463204e0b3684b8bc1acc4e", kill_on_drop: false }`
[INFO] [stderr]    Compiling sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "1873a535545889ec192bf05a38717b094ed641e52463204e0b3684b8bc1acc4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1873a535545889ec192bf05a38717b094ed641e52463204e0b3684b8bc1acc4e", kill_on_drop: false }`
[INFO] [stdout] 1873a535545889ec192bf05a38717b094ed641e52463204e0b3684b8bc1acc4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+f9988fefd3add01f414f52b414308e7872622fee" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] aa7feeab273f4ce4bce7c3e1d8393eb7a468a797ddd6abb79e224e257c0d2951
[INFO] running `Command { std: "docker" "start" "-a" "aa7feeab273f4ce4bce7c3e1d8393eb7a468a797ddd6abb79e224e257c0d2951", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/sudoku-98053b6f653fcbc5)
[INFO] [stdout] running 14 tests
[INFO] [stdout] test checker::tests::incorrect_check ... ok
[INFO] [stdout] test grid::tests::test_row ... ok
[INFO] [stdout] test grid::tests::test_is_full ... ok
[INFO] [stdout] test grid::tests::test_square_need ... ok
[INFO] [stdout] test solver::tests::test_grid_col_check ... ok
[INFO] [stdout] test solver::tests::test_grid_row_check ... ok
[INFO] [stdout] test solver::tests::test_this_val ... ok
[INFO] [stdout] test grid::tests::test_col ... ok
[INFO] [stdout] test solver::tests::test_solve ... ok
[INFO] [stdout] test creator::tests::test_create_grid ... FAILED
[INFO] [stdout] test creator::tests::test_create_grid2 ... FAILED
[INFO] [stdout] test creator::tests::test_create_grid3 ... FAILED
[INFO] [stdout] test creator::tests::test_full_grid ... ok
[INFO] [stdout] test solver::tests::test_is_correct ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- creator::tests::test_create_grid stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'creator::tests::test_create_grid' (18) panicked at src/creator.rs:223:51:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x57533581da8a - std[1209cfb42f6d497f]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x57533581da8a - std[1209cfb42f6d497f]::backtrace_rs::backtrace::trace_unsynchronized::<std[1209cfb42f6d497f]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x57533581da8a - std[1209cfb42f6d497f]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x57533581da8a - <<std[1209cfb42f6d497f]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[4a92201981c6b77a]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x575335831f6a - <core[4a92201981c6b77a]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x575335831f6a - core[4a92201981c6b77a]::fmt::write
[INFO] [stdout]    6:     0x5753358222c2 - std[1209cfb42f6d497f]::io::default_write_fmt::<alloc[420bb310a727dfd7]::vec::Vec<u8>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/io/mod.rs:621:11
[INFO] [stdout]    7:     0x5753358222c2 - <alloc[420bb310a727dfd7]::vec::Vec<u8> as std[1209cfb42f6d497f]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/io/mod.rs:1976:13
[INFO] [stdout]    8:     0x5753357fca8f - <std[1209cfb42f6d497f]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x5753357fca8f - std[1209cfb42f6d497f]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x575335815ee9 - std[1209cfb42f6d497f]::panicking::default_hook
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x57533577ad2c - <alloc[420bb310a727dfd7]::boxed::Box<dyn for<'a, 'b> core[4a92201981c6b77a]::ops::function::Fn<(&'a std[1209cfb42f6d497f]::panic::PanicHookInfo<'b>,), Output = ()> + core[4a92201981c6b77a]::marker::Sync + core[4a92201981c6b77a]::marker::Send> as core[4a92201981c6b77a]::ops::function::Fn<(&std[1209cfb42f6d497f]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/alloc/src/boxed.rs:2285:9
[INFO] [stdout]   12:     0x57533577ad2c - test[59e67a9bc0e119f1]::test_main_inner::<test[59e67a9bc0e119f1]::test_main_static::{closure#0}>::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:155:21
[INFO] [stdout]   13:     0x5753358160a2 - <alloc[420bb310a727dfd7]::boxed::Box<dyn for<'a, 'b> core[4a92201981c6b77a]::ops::function::Fn<(&'a std[1209cfb42f6d497f]::panic::PanicHookInfo<'b>,), Output = ()> + core[4a92201981c6b77a]::marker::Sync + core[4a92201981c6b77a]::marker::Send> as core[4a92201981c6b77a]::ops::function::Fn<(&std[1209cfb42f6d497f]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/alloc/src/boxed.rs:2285:9
[INFO] [stdout]   14:     0x5753358160a2 - std[1209cfb42f6d497f]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x5753357fcb48 - std[1209cfb42f6d497f]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:698:13
[INFO] [stdout]   16:     0x5753357f1d59 - std[1209cfb42f6d497f]::sys::backtrace::__rust_end_short_backtrace::<std[1209cfb42f6d497f]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x5753357fd85d - __rustc[4effac393e9f3da6]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x5753358326fc - core[4a92201981c6b77a]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x575335832472 - core[4a92201981c6b77a]::result::unwrap_failed
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/result.rs:1867:5
[INFO] [stdout]   20:     0x5753357614ae - <core[4a92201981c6b77a]::result::Result<std[1209cfb42f6d497f]::fs::File, std[1209cfb42f6d497f]::io::error::Error>>::unwrap
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/result.rs:1233:23
[INFO] [stdout]   21:     0x5753357614ae - sudoku[2301553b4eb64401]::creator::tests::test_create_grid
[INFO] [stdout]                                at /opt/rustwide/workdir/src/creator.rs:223:51
[INFO] [stdout]   22:     0x57533575e807 - sudoku[2301553b4eb64401]::creator::tests::test_create_grid::{closure#0}
[INFO] [stdout]                                at /opt/rustwide/workdir/src/creator.rs:222:26
[INFO] [stdout]   23:     0x57533576db66 - <sudoku[2301553b4eb64401]::creator::tests::test_create_grid::{closure#0} as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x57533576e00b - <fn() -> core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String> as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x57533576e00b - test[59e67a9bc0e119f1]::__rust_begin_short_backtrace::<core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>, fn() -> core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:724:18
[INFO] [stdout]   26:     0x57533577b7fb - test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:747:74
[INFO] [stdout]   27:     0x57533577b7fb - <core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}> as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/panic/unwind_safe.rs:275:9
[INFO] [stdout]   28:     0x57533577b7fb - std[1209cfb42f6d497f]::panicking::catch_unwind::do_call::<core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}>, core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:581:40
[INFO] [stdout]   29:     0x57533577b7fb - std[1209cfb42f6d497f]::panicking::catch_unwind::<core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>, core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:544:19
[INFO] [stdout]   30:     0x57533577b7fb - std[1209cfb42f6d497f]::panic::catch_unwind::<core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}>, core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x57533577b7fb - test[59e67a9bc0e119f1]::run_test_in_process
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:747:27
[INFO] [stdout]   32:     0x57533577b7fb - test[59e67a9bc0e119f1]::run_test::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:668:43
[INFO] [stdout]   33:     0x575335774f14 - test[59e67a9bc0e119f1]::run_test::{closure#1}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:698:41
[INFO] [stdout]   34:     0x575335774f14 - std[1209cfb42f6d497f]::sys::backtrace::__rust_begin_short_backtrace::<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   35:     0x57533577e402 - std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked::<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/thread/lifecycle.rs:70:13
[INFO] [stdout]   36:     0x57533577e402 - <core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}> as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/panic/unwind_safe.rs:275:9
[INFO] [stdout]   37:     0x57533577e402 - std[1209cfb42f6d497f]::panicking::catch_unwind::do_call::<core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:581:40
[INFO] [stdout]   38:     0x57533577e402 - std[1209cfb42f6d497f]::panicking::catch_unwind::<(), core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:544:19
[INFO] [stdout]   39:     0x57533577e402 - std[1209cfb42f6d497f]::panic::catch_unwind::<core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x57533577e402 - std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked::<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/thread/lifecycle.rs:68:26
[INFO] [stdout]   41:     0x57533577e402 - <std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1} as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x57533581d39f - <alloc[420bb310a727dfd7]::boxed::Box<dyn core[4a92201981c6b77a]::ops::function::FnOnce<(), Output = ()> + core[4a92201981c6b77a]::marker::Send> as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/alloc/src/boxed.rs:2271:9
[INFO] [stdout]   43:     0x57533581d39f - <std[1209cfb42f6d497f]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/thread/unix.rs:118:17
[INFO] [stdout]   44:     0x7771fd15faa4 - <unknown>
[INFO] [stdout]   45:     0x7771fd1eca64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- creator::tests::test_create_grid2 stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'creator::tests::test_create_grid2' (19) panicked at src/creator.rs:237:52:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x57533581da8a - std[1209cfb42f6d497f]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x57533581da8a - std[1209cfb42f6d497f]::backtrace_rs::backtrace::trace_unsynchronized::<std[1209cfb42f6d497f]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x57533581da8a - std[1209cfb42f6d497f]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x57533581da8a - <<std[1209cfb42f6d497f]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[4a92201981c6b77a]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x575335831f6a - <core[4a92201981c6b77a]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x575335831f6a - core[4a92201981c6b77a]::fmt::write
[INFO] [stdout]    6:     0x5753358222c2 - std[1209cfb42f6d497f]::io::default_write_fmt::<alloc[420bb310a727dfd7]::vec::Vec<u8>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/io/mod.rs:621:11
[INFO] [stdout]    7:     0x5753358222c2 - <alloc[420bb310a727dfd7]::vec::Vec<u8> as std[1209cfb42f6d497f]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/io/mod.rs:1976:13
[INFO] [stdout]    8:     0x5753357fca8f - <std[1209cfb42f6d497f]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x5753357fca8f - std[1209cfb42f6d497f]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x575335815ee9 - std[1209cfb42f6d497f]::panicking::default_hook
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x57533577ad2c - <alloc[420bb310a727dfd7]::boxed::Box<dyn for<'a, 'b> core[4a92201981c6b77a]::ops::function::Fn<(&'a std[1209cfb42f6d497f]::panic::PanicHookInfo<'b>,), Output = ()> + core[4a92201981c6b77a]::marker::Sync + core[4a92201981c6b77a]::marker::Send> as core[4a92201981c6b77a]::ops::function::Fn<(&std[1209cfb42f6d497f]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/alloc/src/boxed.rs:2285:9
[INFO] [stdout]   12:     0x57533577ad2c - test[59e67a9bc0e119f1]::test_main_inner::<test[59e67a9bc0e119f1]::test_main_static::{closure#0}>::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:155:21
[INFO] [stdout]   13:     0x5753358160a2 - <alloc[420bb310a727dfd7]::boxed::Box<dyn for<'a, 'b> core[4a92201981c6b77a]::ops::function::Fn<(&'a std[1209cfb42f6d497f]::panic::PanicHookInfo<'b>,), Output = ()> + core[4a92201981c6b77a]::marker::Sync + core[4a92201981c6b77a]::marker::Send> as core[4a92201981c6b77a]::ops::function::Fn<(&std[1209cfb42f6d497f]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/alloc/src/boxed.rs:2285:9
[INFO] [stdout]   14:     0x5753358160a2 - std[1209cfb42f6d497f]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x5753357fcb48 - std[1209cfb42f6d497f]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:698:13
[INFO] [stdout]   16:     0x5753357f1d59 - std[1209cfb42f6d497f]::sys::backtrace::__rust_end_short_backtrace::<std[1209cfb42f6d497f]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x5753357fd85d - __rustc[4effac393e9f3da6]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x5753358326fc - core[4a92201981c6b77a]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x575335832472 - core[4a92201981c6b77a]::result::unwrap_failed
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/result.rs:1867:5
[INFO] [stdout]   20:     0x575335761abe - <core[4a92201981c6b77a]::result::Result<std[1209cfb42f6d497f]::fs::File, std[1209cfb42f6d497f]::io::error::Error>>::unwrap
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/result.rs:1233:23
[INFO] [stdout]   21:     0x575335761abe - sudoku[2301553b4eb64401]::creator::tests::test_create_grid2
[INFO] [stdout]                                at /opt/rustwide/workdir/src/creator.rs:237:52
[INFO] [stdout]   22:     0x57533575e837 - sudoku[2301553b4eb64401]::creator::tests::test_create_grid2::{closure#0}
[INFO] [stdout]                                at /opt/rustwide/workdir/src/creator.rs:236:27
[INFO] [stdout]   23:     0x57533576dba6 - <sudoku[2301553b4eb64401]::creator::tests::test_create_grid2::{closure#0} as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x57533576e00b - <fn() -> core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String> as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x57533576e00b - test[59e67a9bc0e119f1]::__rust_begin_short_backtrace::<core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>, fn() -> core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:724:18
[INFO] [stdout]   26:     0x57533577b7fb - test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:747:74
[INFO] [stdout]   27:     0x57533577b7fb - <core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}> as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/panic/unwind_safe.rs:275:9
[INFO] [stdout]   28:     0x57533577b7fb - std[1209cfb42f6d497f]::panicking::catch_unwind::do_call::<core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}>, core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:581:40
[INFO] [stdout]   29:     0x57533577b7fb - std[1209cfb42f6d497f]::panicking::catch_unwind::<core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>, core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:544:19
[INFO] [stdout]   30:     0x57533577b7fb - std[1209cfb42f6d497f]::panic::catch_unwind::<core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}>, core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x57533577b7fb - test[59e67a9bc0e119f1]::run_test_in_process
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:747:27
[INFO] [stdout]   32:     0x57533577b7fb - test[59e67a9bc0e119f1]::run_test::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:668:43
[INFO] [stdout]   33:     0x575335774f14 - test[59e67a9bc0e119f1]::run_test::{closure#1}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:698:41
[INFO] [stdout]   34:     0x575335774f14 - std[1209cfb42f6d497f]::sys::backtrace::__rust_begin_short_backtrace::<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   35:     0x57533577e402 - std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked::<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/thread/lifecycle.rs:70:13
[INFO] [stdout]   36:     0x57533577e402 - <core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}> as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/panic/unwind_safe.rs:275:9
[INFO] [stdout]   37:     0x57533577e402 - std[1209cfb42f6d497f]::panicking::catch_unwind::do_call::<core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:581:40
[INFO] [stdout]   38:     0x57533577e402 - std[1209cfb42f6d497f]::panicking::catch_unwind::<(), core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:544:19
[INFO] [stdout]   39:     0x57533577e402 - std[1209cfb42f6d497f]::panic::catch_unwind::<core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x57533577e402 - std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked::<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/thread/lifecycle.rs:68:26
[INFO] [stdout]   41:     0x57533577e402 - <std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1} as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x57533581d39f - <alloc[420bb310a727dfd7]::boxed::Box<dyn core[4a92201981c6b77a]::ops::function::FnOnce<(), Output = ()> + core[4a92201981c6b77a]::marker::Send> as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/alloc/src/boxed.rs:2271:9
[INFO] [stdout]   43:     0x57533581d39f - <std[1209cfb42f6d497f]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/thread/unix.rs:118:17
[INFO] [stdout]   44:     0x7771fd15faa4 - <unknown>
[INFO] [stdout]   45:     0x7771fd1eca64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- creator::tests::test_create_grid3 stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'creator::tests::test_create_grid3' (20) panicked at src/creator.rs:251:52:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x57533581da8a - std[1209cfb42f6d497f]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x57533581da8a - std[1209cfb42f6d497f]::backtrace_rs::backtrace::trace_unsynchronized::<std[1209cfb42f6d497f]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x57533581da8a - std[1209cfb42f6d497f]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x57533581da8a - <<std[1209cfb42f6d497f]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[4a92201981c6b77a]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x575335831f6a - <core[4a92201981c6b77a]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x575335831f6a - core[4a92201981c6b77a]::fmt::write
[INFO] [stdout]    6:     0x5753358222c2 - std[1209cfb42f6d497f]::io::default_write_fmt::<alloc[420bb310a727dfd7]::vec::Vec<u8>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/io/mod.rs:621:11
[INFO] [stdout]    7:     0x5753358222c2 - <alloc[420bb310a727dfd7]::vec::Vec<u8> as std[1209cfb42f6d497f]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/io/mod.rs:1976:13
[INFO] [stdout]    8:     0x5753357fca8f - <std[1209cfb42f6d497f]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x5753357fca8f - std[1209cfb42f6d497f]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x575335815ee9 - std[1209cfb42f6d497f]::panicking::default_hook
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x57533577ad2c - <alloc[420bb310a727dfd7]::boxed::Box<dyn for<'a, 'b> core[4a92201981c6b77a]::ops::function::Fn<(&'a std[1209cfb42f6d497f]::panic::PanicHookInfo<'b>,), Output = ()> + core[4a92201981c6b77a]::marker::Sync + core[4a92201981c6b77a]::marker::Send> as core[4a92201981c6b77a]::ops::function::Fn<(&std[1209cfb42f6d497f]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/alloc/src/boxed.rs:2285:9
[INFO] [stdout]   12:     0x57533577ad2c - test[59e67a9bc0e119f1]::test_main_inner::<test[59e67a9bc0e119f1]::test_main_static::{closure#0}>::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:155:21
[INFO] [stdout]   13:     0x5753358160a2 - <alloc[420bb310a727dfd7]::boxed::Box<dyn for<'a, 'b> core[4a92201981c6b77a]::ops::function::Fn<(&'a std[1209cfb42f6d497f]::panic::PanicHookInfo<'b>,), Output = ()> + core[4a92201981c6b77a]::marker::Sync + core[4a92201981c6b77a]::marker::Send> as core[4a92201981c6b77a]::ops::function::Fn<(&std[1209cfb42f6d497f]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/alloc/src/boxed.rs:2285:9
[INFO] [stdout]   14:     0x5753358160a2 - std[1209cfb42f6d497f]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x5753357fcb48 - std[1209cfb42f6d497f]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:698:13
[INFO] [stdout]   16:     0x5753357f1d59 - std[1209cfb42f6d497f]::sys::backtrace::__rust_end_short_backtrace::<std[1209cfb42f6d497f]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x5753357fd85d - __rustc[4effac393e9f3da6]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x5753358326fc - core[4a92201981c6b77a]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x575335832472 - core[4a92201981c6b77a]::result::unwrap_failed
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/result.rs:1867:5
[INFO] [stdout]   20:     0x5753357620ce - <core[4a92201981c6b77a]::result::Result<std[1209cfb42f6d497f]::fs::File, std[1209cfb42f6d497f]::io::error::Error>>::unwrap
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/result.rs:1233:23
[INFO] [stdout]   21:     0x5753357620ce - sudoku[2301553b4eb64401]::creator::tests::test_create_grid3
[INFO] [stdout]                                at /opt/rustwide/workdir/src/creator.rs:251:52
[INFO] [stdout]   22:     0x57533575e867 - sudoku[2301553b4eb64401]::creator::tests::test_create_grid3::{closure#0}
[INFO] [stdout]                                at /opt/rustwide/workdir/src/creator.rs:250:27
[INFO] [stdout]   23:     0x57533576dbe6 - <sudoku[2301553b4eb64401]::creator::tests::test_create_grid3::{closure#0} as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x57533576e00b - <fn() -> core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String> as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x57533576e00b - test[59e67a9bc0e119f1]::__rust_begin_short_backtrace::<core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>, fn() -> core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:724:18
[INFO] [stdout]   26:     0x57533577b7fb - test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:747:74
[INFO] [stdout]   27:     0x57533577b7fb - <core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}> as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/panic/unwind_safe.rs:275:9
[INFO] [stdout]   28:     0x57533577b7fb - std[1209cfb42f6d497f]::panicking::catch_unwind::do_call::<core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}>, core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:581:40
[INFO] [stdout]   29:     0x57533577b7fb - std[1209cfb42f6d497f]::panicking::catch_unwind::<core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>, core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:544:19
[INFO] [stdout]   30:     0x57533577b7fb - std[1209cfb42f6d497f]::panic::catch_unwind::<core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<test[59e67a9bc0e119f1]::run_test_in_process::{closure#0}>, core[4a92201981c6b77a]::result::Result<(), alloc[420bb310a727dfd7]::string::String>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x57533577b7fb - test[59e67a9bc0e119f1]::run_test_in_process
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:747:27
[INFO] [stdout]   32:     0x57533577b7fb - test[59e67a9bc0e119f1]::run_test::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:668:43
[INFO] [stdout]   33:     0x575335774f14 - test[59e67a9bc0e119f1]::run_test::{closure#1}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/test/src/lib.rs:698:41
[INFO] [stdout]   34:     0x575335774f14 - std[1209cfb42f6d497f]::sys::backtrace::__rust_begin_short_backtrace::<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   35:     0x57533577e402 - std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked::<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/thread/lifecycle.rs:70:13
[INFO] [stdout]   36:     0x57533577e402 - <core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}> as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/panic/unwind_safe.rs:275:9
[INFO] [stdout]   37:     0x57533577e402 - std[1209cfb42f6d497f]::panicking::catch_unwind::do_call::<core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:581:40
[INFO] [stdout]   38:     0x57533577e402 - std[1209cfb42f6d497f]::panicking::catch_unwind::<(), core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panicking.rs:544:19
[INFO] [stdout]   39:     0x57533577e402 - std[1209cfb42f6d497f]::panic::catch_unwind::<core[4a92201981c6b77a]::panic::unwind_safe::AssertUnwindSafe<std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x57533577e402 - std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked::<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/thread/lifecycle.rs:68:26
[INFO] [stdout]   41:     0x57533577e402 - <std[1209cfb42f6d497f]::thread::lifecycle::spawn_unchecked<test[59e67a9bc0e119f1]::run_test::{closure#1}, ()>::{closure#1} as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x57533581d39f - <alloc[420bb310a727dfd7]::boxed::Box<dyn core[4a92201981c6b77a]::ops::function::FnOnce<(), Output = ()> + core[4a92201981c6b77a]::marker::Send> as core[4a92201981c6b77a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/alloc/src/boxed.rs:2271:9
[INFO] [stdout]   43:     0x57533581d39f - <std[1209cfb42f6d497f]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/f9988fefd3add01f414f52b414308e7872622fee/library/std/src/sys/thread/unix.rs:118:17
[INFO] [stdout]   44:     0x7771fd15faa4 - <unknown>
[INFO] [stdout]   45:     0x7771fd1eca64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     creator::tests::test_create_grid
[INFO] [stdout]     creator::tests::test_create_grid2
[INFO] [stdout]     creator::tests::test_create_grid3
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] [stdout] test result: FAILED. 11 passed; 3 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.17s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "aa7feeab273f4ce4bce7c3e1d8393eb7a468a797ddd6abb79e224e257c0d2951", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa7feeab273f4ce4bce7c3e1d8393eb7a468a797ddd6abb79e224e257c0d2951", kill_on_drop: false }`
[INFO] [stdout] aa7feeab273f4ce4bce7c3e1d8393eb7a468a797ddd6abb79e224e257c0d2951
