R Under development (unstable) (2026-02-24 r89478 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> # This file is part of the standard setup for testthat.
> # It is recommended that you do not modify it.
> #
> # Where should you do additional test configuration?
> # Learn more about the roles of various files in:
> # * https://r-pkgs.org/testing-design.html#sec-tests-files-overview
> # * https://testthat.r-lib.org/articles/special-files.html
> 
> library(testthat)
> test_check("fozziejoin")
Loading required package: fozziejoin
Saving _problems/test_fozzie_string_inner_join-347.R

thread '<unnamed>' (76944) panicked at D:\temp\2026_02_25_14_55_17_31974\RtmpgvMmc7\R.INSTALL15194471a504b\fozziejoin\src\vendor\extendr-api\src\robj\into_robj.rs:74:13:
called `Result::unwrap()` on an `Err` value: Failed initial regex join: Failed to build RegexSet: regex parse error:
    (
    ^
error: unclosed group
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

thread '<unnamed>' (76944) panicked at src\lib.rs:212:1:
explicit panic
[ FAIL 1 | WARN 0 | SKIP 0 | PASS 143 ]

══ Failed tests ════════════════════════════════════════════════════════════════
── Failure ('test_fozzie_string_inner_join.R:347:5'): nthread argument works for unnormalized edit distances ──
Expected `runtime["user.self"]` <= `2.5 * runtime["elapsed"]`.
Actual comparison: 0.0300 > 0.0250
Difference: 0.0050 > 0

[ FAIL 1 | WARN 0 | SKIP 0 | PASS 143 ]
Error:
! Test failures.
Execution halted