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While answering this question I noticed that I got the following dialog while atempting to move the “cursor” while an exception was being handled:
Unable to set the next statement to this location. The attempt to unwind the callstack failed.
Unwinding is not possible in the following scenarios:
- Debugging was started via Just-In-Time debugging.
- An unwind is in progress
- A System.StackOverflowException or System.Threading.ThreadAbortException exception has been thrown.
What exactly is an unwind?
It’s me!No, in this context it typically refers to the process of stepping (“backwards”/”upwards”) through a stack, removing successive frames until you’ve come back to the desired level. Typical stacks are (of course) very linear in their structure, frames are stacked end-to-end after each other, so there’s not really much literal unwinding going on, but that’s what it’s called.
This Wikipedia page has more detail.