Re: libf2c/4931: Code hangs while computing log of specific complex number

Re: libf2c/4931: Code hangs while computing log of specific complex number

[Tim Prince]

The following reply was made to PR libf2c/4931; it has been noted by GNATS.

From: "Tim Prince" <tprince@computer.org>
To: <toon@moene.indiv.nluug.nl>,
	<gcc-gnats@gcc.gnu.org>
Cc: "Stefano Simonucci" <stefano.simonucci@tin.it>
Subject: Re: libf2c/4931: Code hangs while computing log of specific complex number
Date: Thu, 22 Nov 2001 20:22:22 -0800

 Running this with g77-3.1 under gdb on cygwin, it's hanging in the final
 do{..}while(s>s0) in z_log().  Attempting to display the values of local
 variables crashes gdb.  If this awkward looking code is to be preserved, it
 looks like the loop ending condition needs to change to something like
 while(s > s0 +DBL_EPSILON).
 ----- Original Message -----
 From: <toon@moene.indiv.nluug.nl>
 To: <gcc-gnats@gcc.gnu.org>
 Cc: "Stefano Simonucci" <stefano.simonucci@tin.it>
 Sent: Thursday, November 22, 2001 2:14 PM
 Subject: libf2c/4931: Code hangs while computing log of specific complex
 number
 
 
 >
 > >Number:         4931
 > >Category:       libf2c
 > >Synopsis:       Code hangs while computing log of specific complex number
 > >Confidential:   no
 > >Severity:       serious
 > >Priority:       medium
 > >Responsible:    unassigned
 > >State:          open
 > >Class:          sw-bug
 > >Submitter-Id:   net
 > >Arrival-Date:   Thu Nov 22 14:16:01 PST 2001
 > >Closed-Date:
 > >Last-Modified:
 > >Originator:     Stefano Simonucci
 > >Release:        g77-3.0.x (release), g77-3.1 (experimental)
 > >Organization:
 > >Environment:
 > Not relevant.
 > >Description:
 > The following code hangs:
 >
 >       double complex a,b
 >       a=(-0.992198783,-0.0275850352)
 >       write(6,*) ' A',a
 >       b=log(a)
 >       write(6,*) ' B',b
 >       stop
 >       end
 >
 > before printing B.
 > >How-To-Repeat:
 >
 > >Fix:
 >
 > >Release-Note:
 > >Audit-Trail:
 > >Unformatted:
 

Re: libf2c/4931: Code hangs while computing log of specific complex number

[toon]

The following reply was made to PR libf2c/4931; it has been noted by GNATS.

From: toon@gcc.gnu.org
To: gcc-bugs@gcc.gnu.org, gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org,
  nobody@gcc.gnu.org, stefano.simonucci@tin.it, toon@gcc.gnu.org,
  toon@moene.indiv.nluug.nl
Cc:  
Subject: Re: libf2c/4931: Code hangs while computing log of specific complex number
Date: 22 Nov 2001 22:19:32 -0000

 Synopsis: Code hangs while computing log of specific complex number
 
 Responsible-Changed-From-To: unassigned->toon
 Responsible-Changed-By: toon
 Responsible-Changed-When: Thu Nov 22 14:19:32 2001
 Responsible-Changed-Why:
     Mea Culpa.
 State-Changed-From-To: open->closed
 State-Changed-By: toon
 State-Changed-When: Thu Nov 22 14:19:32 2001
 State-Changed-Why:
     Duplicate of 4930 ... ugh - update display of GNATS :-(
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=4931&database=gcc

Re: libf2c/4931: Code hangs while computing log of specific complex number

[toon]

Synopsis: Code hangs while computing log of specific complex number

Responsible-Changed-From-To: unassigned->toon
Responsible-Changed-By: toon
Responsible-Changed-When: Thu Nov 22 14:19:32 2001
Responsible-Changed-Why:
    Mea Culpa.
State-Changed-From-To: open->closed
State-Changed-By: toon
State-Changed-When: Thu Nov 22 14:19:32 2001
State-Changed-Why:
    Duplicate of 4930 ... ugh - update display of GNATS :-(

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=4931&database=gcc

libf2c/4931: Code hangs while computing log of specific complex number

[toon]

>Number:         4931
>Category:       libf2c
>Synopsis:       Code hangs while computing log of specific complex number
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Nov 22 14:16:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Stefano Simonucci
>Release:        g77-3.0.x (release), g77-3.1 (experimental)
>Organization:
>Environment:
Not relevant.
>Description:
The following code hangs:

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

before printing B.
>How-To-Repeat:

>Fix:

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