Prevention work surfaced a real latent bug: findAndReplace looped forever
(OOM) on any non-global regex with a match — `match` was only reassigned
inside `if (regex.global)`, so a non-global regex never advanced. Fixed by
treating a non-global regex as a single match (`match = regex.global ?
regex.exec(text) : null`) and added a regression test. Latent in practice
(all current callers pass global regexes), but a crash waiting to happen.
New suites (tsx + node:test), verified empirically:
- utils/findAndReplace (10, incl. the regression)
- utils/AsyncSearch (9): normalize + matchQuery (the timer-based class is
skipped — needs window.performance/setTimeout, unavailable in node)
- utils/ASCIILexicalTable (10): orderKeys gap-filling + invariants
Full suite now 103 tests, all passing.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
