[Bug fortran/55174] [4.6 Regression] Segmentation fault with bad array reference

["harper at msor dot vuw.ac.nz" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55174

--- Comment #6 from harper at msor dot vuw.ac.nz 2012-11-05 00:52:10 UTC ---
On Mon, 5 Nov 2012, John Harper wrote:

> Date: Mon, 5 Nov 2012 13:02:37 +1300 (NZDT)
> From: John Harper <harper@msor.vuw.ac.nz>
> To: janus at gcc dot gnu.org <gcc-bugzilla@gcc.gnu.org>
> Subject: Re: [Bug fortran/55174] [4.6 Regression] Segmentation fault with bad
>     array reference
> 
> On Sun, 4 Nov 2012, janus at gcc dot gnu.org wrote:
>
>> Date: Sun, 4 Nov 2012 22:23:40 +0000
>> From: janus at gcc dot gnu.org <gcc-bugzilla@gcc.gnu.org>
>> To: john.harper@vuw.ac.nz
>> Subject: [Bug fortran/55174] [4.6 Regression] Segmentation fault with bad
>>     array reference
>> Resent-Date: Sun, 4 Nov 2012 22:24:00 +0000
>> Resent-From: <john.harper@vuw.ac.nz>
>> 
>> 
>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55174
>> 
>> janus at gcc dot gnu.org changed:
>>
>>           What    |Removed                     |Added
>> 
>> ----------------------------------------------------------------------------
>>             Status|NEW                         |RESOLVED
>>         Resolution|                            |DUPLICATE
>> 
>> --- Comment #4 from janus at gcc dot gnu.org 2012-11-04 22:23:40 UTC ---
>> (In reply to comment #3)
>>> I have just tried gfortran 4.7.1 (x86_64-unknown-linux-gnu) and it
>>> gave the internal compiler error with my program. So it seems that
>>> 4.7.0 and 4.7.1 both have the bug and 4.7.2 does not.
>> 
>> Good. So it has been fixed between 4.7.1 and 4.7.2, apparently by this 
>> commit:
>> 
>> http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191216
>> 
>> This is the fix for PR 54225, and the good news is that it has also been
>> backported to the 4.6 branch and therefore will be part of the future 4.6.4
>> release.
>> 
>> So I think we can just close this as a duplicate of PR 54225.
>> 
>> Nevertheless, thanks for the bug report!
>> 
>> *** This bug has been marked as a duplicate of bug 54225 ***
>> 
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>
> You may well be right. I'll be convinced if your analysis also explains
> why the bug was there in 4.8.0 of 20120701 but not in 4.8.0 of 20121002.

Apologies - I should have looked carefully at the dates for bug 54225.
The bug was fixed between 20120701 and 20121002 so you are indeed right.

-- John Harper, School of Mathematics Statistics and Operations Research
Victoria University, PO Box 600, Wellington 6140, New Zealand
e-mail john.harper@vuw.ac.nz phone (+64)(4)463 5276 fax (+64)(4)463 5045