Marks a function so its call frames are skipped by stack-walking functions. When hidden, the function does not appear to getfenv, debug.info, debug.traceback and related level-based inspection, so code probing the stack sees the game’s frames rather than yours.

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Parameters

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function | number
required
The function to hide, or a stack level resolving to a function currently on the stack. Level 0 is the calling function, 1 its caller, and so on.
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boolean
required
true to hide the function’s frames, false to stop hiding them.

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Behavior

  • Hiding is per-function and persistent until you set it back to false.
  • When any function is hidden, the environment’s stack-level accounting transparently skips hidden frames, so a script calling getfenv(2) or debug.info(2, ...) counts visible frames only.
  • Passing a level resolves the function at that level once, at call time, and hides that function.
One thing to keep in mind: hiding frames changes what level-based functions observe. If your own code also leans on stack levels while something is hidden, account for the shift.

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Example

Hide the current function’s frames from anything that inspects the stack:

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Errors