[Octave-bug-tracker] [bug #50919] Beta function throws FORTRAN errors

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?50919>

                 Summary: Beta function throws FORTRAN errors
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Tue 02 May 2017 09:23:28 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error
                  Status: None
             Assigned to: None
         Originator Name: R Taylor
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.1
        Operating System: Microsoft Windows

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Details:

beta(-4.5, 0.6) is ok
beta(-4.6, 0.6) throws a FORTRAN error
beta(-4.7, 0.6) is ok

 ***MESSAGE FROM ROUTINE DGAMMA IN LIBRARY SLATEC.
 ***POTENTIALLY RECOVERABLE ERROR, PROG ABORTED, TRACEBACK REQUESTED
 *  ANSWER LT HALF PRECISION BECAUSE X TOO NEAR NEGATIVE INTEGER
 *  ERROR NUMBER = 1
 *
 ***END OF MESSAGE

 ***JOB ABORT DUE TO UNRECOVERED ERROR.
0          ERROR MESSAGE SUMMARY
 LIBRARY    SUBROUTINE MESSAGE START             NERR     LEVEL     COUNT
 SLATEC     DGAMMA     ANSWER LT HALF PRECI         1         1         1

error: lgamma: exception encountered in Fortran subroutine dlgams_
error: called from
    beta at line 60 column 10




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