Qiskit
Panic on PruneSearch
When raising PruneSearch in the finish_vertex traversal event, the traversal methods raise PanicError.
I suggest raising RuntimeError instead. This properly inherits from Exception (and not only from BaseException) and has a specific type a user can try: ...; except RunimeError: ....
Panic also has a side effect of printing to stderr a panic message (other than the python-raised exception traceback).
I think this stderr message should be avoided if possible, but I'm not sure there is an easy solution for this (other than the breaking change of rustworkx-core not panicking).
This was raised in issue https://github.com/Qiskit/rustworkx/issues/1361, which was closed in PR https://github.com/Qiskit/rustworkx/pull/1375.
I guess this point got drowned in the documentation change discussions, so I'm opening a new issue for it here.
(The raised exception in the finish event was added to the rustworkx docs in that PR with the exception type unmentioned).
If there is already a PR for this, or this enhancement is unwanted feel free to close this issue.
Yes, we marked the PR as closing the issue. Reopening is fine, we should track the unwanted panics.
