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Support for debugging Fibers has been partially implemented. Fibers will appear to the debugger as ordinary threads. When you view the list of threads from within the debugger, you will see both fibers and the carrier threads they run on. Depending on the debugging mode, not all fibers may appear in the thread list. See Fiber Debugging Modes below.
If a fiber is mounted, both the fiber and its carrier thread are basically the same execution context. If one is at a breakpoint, they both will appear to be at the same breakpoint. They will have the same stack traces, and single stepping in one advances the PC in the other. They are essentially two different views of the same thread (with some minor exceptions in debugger behavior noted below).
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