[Octave-bug-tracker] [bug #51867] Warning in quadgk with zero size interval

[Avinoam Kalma]

URL:
  <http://savannah.gnu.org/bugs/?51867>

                 Summary: Warning in quadgk with zero size interval
                 Project: GNU Octave
            Submitted by: avinoam
            Submitted on: Sun 27 Aug 2017 05:43:07 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Regression
                  Status: None
             Assigned to: None
         Originator Name: Avinoam
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.1
        Operating System: Any

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Details:



>> fun = @(x) x;
>> quadgk (fun, 0, 1)
ans =  0.50000
>> quadgk (fun, 0, 0)
warning: __quadgk_eval__: some elements in list of return values are
undefined
warning: called from
    quadgk>__quadgk_eval__ at line 441 column 5
    quadgk at line 333 column 18
ans = 0


This warning is due to
[http://hg.savannah.gnu.org/hgweb/octave/rev/ed1722f70fad].
In the early exit from  __quadgk_eval__ (line 441), q and err are not
defined.





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