[Octave-bug-tracker] [bug #59807] quadgk results of v.6 different from results of v.5 (correct ones as checked with MATLAB)

[Rik]

Update of bug #59807 (project octave):

                 Summary: Results of v.6 different from results  of v.5
(correct ones as checked with MATLAB) => quadgk results of v.6 different from
results  of v.5 (correct ones as checked with MATLAB)

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Follow-up Comment #2:

>From the NEWS file for the 6.1 release


- Numerical integration has been improved.  The `quadv` function has
  been re-written so that it can compute integrands of periodic
  functions.  At the same time, performance is better with ~3.5X fewer
  function evaluations required.  A bug in `quadgk` that caused complex
  path integrals specified with `"Waypoints"` to occasionally be
  calculated in the opposite direction was fixed.


We need some examples to ascertain whether the *differences* between v5 and v6
might be related to the use of "Waypoints".

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