To use when catching default exceptions: ensures we don't catch fatal errors like C-c. try-with should _always_ (by decreasing order of preference):

• either catch specific exceptions
• or re-raise the same exception (preferably with Exn.finalise)
• or call this function on the caught exception

Register a backtrace for when you need to process a finalizer (that internally uses exceptions) and then re-raise the same exception. To be printed by pretty_backtrace.

Return a pretty-printed backtrace

Runs the given finaliser, then reraises the given exception, while preserving backtraces (when the OCaml version permits, e.g. >= 4.05.0)

Execute the given continuation, then run the finaliser before returning the result. If an exception is raised, call finalise with the given finaliser.