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The Invisible Character That Cost Me Too Much Debugging Time
Imagine spending too much time chasing a login bug, only to discover the culprit was an invisible character hiding in an email address. This story shows how tiny Unicode quirks can break systems in ways you never expect, and why I built Dochia, a free tool that helps you catch these sneaky issues before they hit production.
Because these are not “big company problems.” They’re the kind of bugs that any developer can hit when their system meets messy, unpredictable user input. They paste from documents, switch keyboard layouts, run browser extensions, sit behind proxies that rewrite headers. If your system assumes “well-formed UTF-8 strings without weirdness,” you’ll eventually burn hours, days, chasing invisible bugs.
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