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devel / comp.lang.fortran / Re: Deallocate problem

SubjectAuthor
* Deallocate problemLouis Krupp
`* Deallocate problemdb
 `- Deallocate problemLouis Krupp

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Re: Deallocate problem

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Subject: Re: Deallocate problem
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 by: Louis Krupp - Wed, 14 Sep 2022 17:22 UTC

On 9/14/2022 4:58 AM, db wrote:
> On 13.09.2022 15.11, Robin Vowels wrote:
> [...]
>>>> .
>>>> You could try deallocating each one separately.
>>> That was the way to the solution. I found that C, X and Z were fine
>>> but it baulked at p. So I looked further and found that although I
>>> had allocated p and r as p(3,NX) and r(3,NZ), in a routine I assigned
>>> values to (p(0,i) and r(0,i), so I overwrote something. When I removed
>>> that, the problem went away. A hard one.
>> .
>> You hadn't used array bounds checking?
>
> I thought I did:
>
> gfortran -o expexpsor.out -g -fcheck=bounds \
>
> ...
>
>

That's why it's good to post a small program that reproduces the
problem; it helps everyone else see exactly what you're seeing.

Louis

Re: Deallocate problem

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From: dieterhansbritz@gmail.com (db)
Newsgroups: comp.lang.fortran
Subject: Re: Deallocate problem
Date: Sat, 17 Sep 2022 13:24:29 +0200
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 by: db - Sat, 17 Sep 2022 11:24 UTC

On 14.09.2022 19.22, Louis Krupp wrote:
> On 9/14/2022 4:58 AM, db wrote:
>> On 13.09.2022 15.11, Robin Vowels wrote:
>> [...]
>>>>> .
>>>>> You could try deallocating each one separately.
>>>> That was the way to the solution. I found that C, X and Z were fine
>>>> but it baulked at p. So I looked further and found that although I
>>>> had allocated p and r as p(3,NX) and r(3,NZ), in a routine I assigned
>>>> values to (p(0,i) and r(0,i), so I overwrote something. When I removed
>>>> that, the problem went away. A hard one.
>>> .
>>> You hadn't used array bounds checking?
>>
>> I thought I did:
>>
>> gfortran -o expexpsor.out -g -fcheck=bounds \
>>
>> ...
>>
>>
>
> That's why it's good to post a small program that reproduces the
> problem; it helps everyone else see exactly what you're seeing.
>
> Louis
>

You are right. But before I found the error I didn't know how to produce
a small program that caused it; and now that I know what did, it seems
pointless. I doubt that it woulkd explain why the bounds check didn't
complain. I use gfortran btw.

--
Dieter Britz

Re: Deallocate problem

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Subject: Re: Deallocate problem
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 by: Louis Krupp - Sun, 18 Sep 2022 08:51 UTC

On 9/17/2022 5:24 AM, db wrote:
> On 14.09.2022 19.22, Louis Krupp wrote:
>> On 9/14/2022 4:58 AM, db wrote:
>>> On 13.09.2022 15.11, Robin Vowels wrote:
>>> [...]
>>>>>> .
>>>>>> You could try deallocating each one separately.
>>>>> That was the way to the solution. I found that C, X and Z were fine
>>>>> but it baulked at p. So I looked further and found that although I
>>>>> had allocated p and r as p(3,NX) and r(3,NZ), in a routine I assigned
>>>>> values to (p(0,i) and r(0,i), so I overwrote something. When I
>>>>> removed
>>>>> that, the problem went away. A hard one.
>>>> .
>>>> You hadn't used array bounds checking?
>>>
>>> I thought I did:
>>>
>>> gfortran -o expexpsor.out -g -fcheck=bounds \
>>>
>>> ...
>>>
>>>
>>
>> That's why it's good to post a small program that reproduces the
>> problem; it helps everyone else see exactly what you're seeing.
>>
>> Louis
>>
>
> You are right. But before I found the error I didn't know how to produce
> a small program that caused it; and now that I know what did, it seems
> pointless. I doubt that it woulkd explain why the bounds check didn't
> complain. I use gfortran btw.
>

Having an example where bounds checking apparently failed might be
interesting. You never know.

Louis

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