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Predicate tbacktrace/2
 tbacktrace(+Thread) is det
 tbacktrace(+Thread, +Options) is det
Print a backtrace for Thread to the stream user_error of the calling thread. This is achieved by inserting an interrupt into Thread using call_in_thread/2. Options:
depth(+MaxFrames)
Number of stack frames to show. Default is the current Prolog flag backtrace_depth or 20.

Other options are passed to get_prolog_backtrace/3.

bug
- call_in_thread/2 may not process the event.
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