[Bug-gsl] [bug #39713] roots/secant.c "derivative value is not finite" for a good guess

[Brian Gladman]

Follow-up Comment #2, bug #39713 (project gsl):

Running the program provided on Windows x64 gives:

# i   x_i-r      x_i - x_p status
  0 -1.110e-016 -2.347e-001 -2
  1  0.000e+000  1.110e-016 0
# Converged
# f(x_i) =  0.0000e+000

so the problem appears to be system dependent.  

On which systems does this error show up?  

Can anyone else confirm this as a problem?



All bug reports should include:

       The version number of GSL
       The hardware and operating system
       The compiler used, including version number and
compilation options
       A description of the bug behaviour
       A short program which reproducibly exercises the bug

It is also useful if you can report whether the same problem occurs
when the library is compiled without optimization.

Thank you.


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