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Bug in G format conversion

 
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mecej4



Joined: 31 Oct 2006
Posts: 878

PostPosted: Wed Jul 13, 2016 4:57 pm    Post subject: Bug in G format conversion Reply with quote

The 64-bit runtime has a bug in output format conversion of numbers between 0.9 and 1.0 with Gn.1 format, e.g., G8.1.
Code:

program chk
implicit none
double precision x
x = 0.96d0
write(*,'(g8.1)')x
end program

The error pop-up that I first see when running the program is:
https://www.dropbox.com/s/uip2iewyb0h9lkq/s1.png
Only upon pressing the CONTINUE button do I see the traceback:
https://www.dropbox.com/s/5z0csuea2qpa41m/s2.png
There is no such problem with the 32-bit compiler.

NOTE: Someone, please provide instructions on attaching images in-line in this forum. I tried selecting the URL and pressing the Img button, but that did not work. Under forum Options I see "HTML is OFF". Is that the cause of the problem?
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JohnCampbell



Joined: 16 Feb 2006
Posts: 1935
Location: Sydney

PostPosted: Thu Jul 14, 2016 12:55 am    Post subject: Reply with quote

mecej4,

I ran your example with the latest update to ftn95 Ver 8.05.0. I do not need CONTINUE as I go straight to your second traceback report. I do reproduce the bug.
I used : ftn95 tst /64 /debug /link
I also do not know the instructions for attaching an image !

John
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PaulLaidler
Site Admin


Joined: 21 Feb 2005
Posts: 5305
Location: Salford, UK

PostPosted: Thu Jul 14, 2016 7:13 am    Post subject: Reply with quote

Thanks for the feedback. This bug has now been fixed.
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PaulLaidler
Site Admin


Joined: 21 Feb 2005
Posts: 5305
Location: Salford, UK

PostPosted: Sat Jul 16, 2016 7:34 am    Post subject: Reply with quote

Here is a link to download a new set of DLLs for testing.
Please remember to save backup copies before replacing the DLLs.

https://www.dropbox.com/s/iuq2riwhfzahbl7/newDLLs1.zip?dl=0
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mecej4



Joined: 31 Oct 2006
Posts: 878

PostPosted: Sat Jul 16, 2016 12:20 pm    Post subject: Reply with quote

Thanks. I ran the full program (from which the short bug reproducer was extracted) with the new DLLs, and it ran correctly.
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mecej4



Joined: 31 Oct 2006
Posts: 878

PostPosted: Mon Sep 05, 2016 2:53 am    Post subject: Reply with quote

The replacement DLLs mentioned in the post of Sat Jul 16, 2016 have the following problem: when a program containing the DEALLOCATE statement is compiled and linked in 64-bit mode, the following linker error occurs:

Code:
The following symbols were not defined:

DEALLOCATE@
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PaulLaidler
Site Admin


Joined: 21 Feb 2005
Posts: 5305
Location: Salford, UK

PostPosted: Mon Sep 05, 2016 8:19 am    Post subject: Reply with quote

Thanks for the feedback. I have added the missing function to clearwin64.dll and here is a new link for downloading. Please let me know if this fixes the problem.

https://www.dropbox.com/s/kty2x6bl8ipn080/newDLLs2.zip?dl=0
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mecej4



Joined: 31 Oct 2006
Posts: 878

PostPosted: Mon Sep 05, 2016 10:39 am    Post subject: Reply with quote

Thanks, Paul. Installing the new DLLs fixed the problem.
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