unswizzle = U = unwind-protect

unwind the stack vi.

1. [techspeak] During the execution of a procedural language, one is said to `unwind the stack' from a called procedure up to a caller when one discards the stack frame and any number of frames above it, popping back up to the level of the given caller. In C this is done with longjmp/setjmp, in LISP or C++ with throw/catch. See also smash the stack. 2. People can unwind the stack as well, by quickly dealing with a bunch of problems: "Oh heck, let's do lunch. Just a second while I unwind my stack."

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.

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