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I spent an entire week debugging my JS Gameboy emulator an year ago.
(The "C" register was read-only for some reason)
Turns out I typed "с" (cyrillic) instead of "c".

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  • 13
    VSCode just recently introduced highlighting of potentially ambiguous characters - can be pretty helpful for things like this.
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  • 1
    @kamen I used sublime for web dev back then
  • 0
    7-bit ASCII in human-readable text source files, escape anything else
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