Stack GrowthThere’s another thing that can happen while a goroutine is running: it can run out of stack space. Go goroutines start with a tiny 2KB stack, and unlike OS threads, they don’t get a fixed-size stack upfront. Instead, the compiler inserts a small check called the stack growth prologue at the beginning of most functions. This check compares the current stack pointer against the stack limit — if there’s not enough room for the next function call, the runtime steps in.
return: Fiber | null;
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Unicode encodes these as separate codepoints for compatibility, but fonts use the same glyph. These are easy to handle (NFKC collapses them), but worth knowing about.
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