Resets this fiber so that it may be re-used, optionally with a
new function/delegate. This routine should only be called for
fibers that have terminated, as doing otherwise could result in
scope-dependent functionality that is not executed.
Stack-based classes, for example, may not be cleaned up
properly if a fiber is reset before it has terminated.
The D Programming Language's Unofficial Docs
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Resets this fiber so that it may be re-used, optionally with a new function/delegate. This routine should only be called for fibers that have terminated, as doing otherwise could result in scope-dependent functionality that is not executed. Stack-based classes, for example, may not be cleaned up properly if a fiber is reset before it has terminated.
In: This fiber must be in state TERM or HOLD.