libf2c/4930: Taking the log of a certain complex number hangs in run time library

[toon@moene.indiv.nluug.nl]

>Number:         4930
>Category:       libf2c
>Synopsis:       Taking the log of a certain complex number hangs in run time library
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Nov 22 14:16:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Stefano Simonucci
>Release:        gcc/g77-3.0 and -3.1 (experimental)
>Organization:
>Environment:
Not relevant.
>Description:
This code, when compiled, hangs before displaying B.

      double complex a,b
      a=(-0.992198783,-0.0275850352)
      write(6,*) ' A',a
      b=log(a)
      write(6,*) ' B',b
      stop
      end
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: