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Stack Frames and Stack Traces

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A stack frame represents a single function call. You can visualize functions that call one another as virtual frames stacking on top of one another. The stack data structure is actually used for this!

When one function call returns its data to its caller, then its stack frame is removed from the stack. New stack frames are added and removed (along with their associated data) until the bottommost stack frame, sometimes called the module frame, gets the data it needs.

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