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Bug in Compiler or Clearwin64.DLL

 
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mecej4



Joined: 31 Oct 2006
Posts: 732

PostPosted: Tue Sep 05, 2017 3:07 pm    Post subject: Bug in Compiler or Clearwin64.DLL Reply with quote

The test program below, when built using FTN95 V8.1 with /debug /64, gives an illegal instruction breakpoint when run.
Code:
      program tst
      implicit none
      double precision, parameter :: one=1.d+0, three=3.d+0
      double precision machep,mepcrt
!
      machep = epsilon(machep)
      mepcrt = machep**(one/three)
      print *,mepcrt
      end     

The contents of the exception pop-up:
Code:

Within file CLEARWIN64.DLL
In  XX$DD at address 4
Within file tst.exe
in TST in line 7, at address 3b

The DLL has file version 19.5.4.6, creation date March 31, 2017, and modification date May 4, 2017.

XX$DD appears to be the routine that calculates x**y for x and y double precision.


Last edited by mecej4 on Tue Sep 05, 2017 7:42 pm; edited 2 times in total
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PaulLaidler
Site Admin


Joined: 21 Feb 2005
Posts: 4919
Location: Salford, UK

PostPosted: Tue Sep 05, 2017 3:31 pm    Post subject: Reply with quote

Thanks for the feedback. This program runs OK for me so it looks like the bug has already been fixed.
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LitusSaxonicum



Joined: 23 Aug 2005
Posts: 1652
Location: Yateley, Hants, UK

PostPosted: Tue Sep 05, 2017 5:22 pm    Post subject: Reply with quote

'Creation date 1017'? Blimey, that makes FTN95 positively Dark Ages ! (Pre the Norman Conquest, anyway). Had Maori arrived in NZ? Were there still Moa roaming the land?
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mecej4



Joined: 31 Oct 2006
Posts: 732

PostPosted: Wed Sep 06, 2017 2:57 pm    Post subject: Re: Reply with quote

LitusSaxonicum wrote:
'Creation date 1017'?
Typo, corrected.
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