Tricky REALBasic bug with assignment in DIM statement

[Alex Lindsay]

I will be sending you the project directly to your email at this time.   
If you do not receive it, please let me know.



On Nov 16, 2004, at 1:48 AM, Ruslan Zasukhin wrote:

> On 11/16/04 5:21 AM, "Alex Lindsay" <alindsay at mac.com> wrote:
>
>> Below is a description of a tricky problem I found with REALBasic
>> 5.5.3.  Please note that this is NOT a Valentina bug but a problem  
>> with
>> REALBasic.  Looks like REALBasic is planning on fixing this in version
>> 6.0.  Please sign onto the bug report to make sure it isn't dropped:
>> <http://www.realsoftware.com/feedback/viewreport.php? 
>> reportid=lgynrrfl>
>>
>> First e-mail from me:
>>
>> I tracked down an unusual problem last week where the reference  
>> counting
>> behaved differently depending upon whether or not it was assigned as
>> part of the Dim assignment.  VCursor is a Valentina cursor and
>> GetCursor() is a method to get a reference to a new cursor.
>>
>>  From memory:
>>
>> First snippet:
>> Sub MySub()
>>     Dim cursor as VCursor = GetCursor()
>>     cursor = nil
>> End Sub
>>
>> Second snippet:
>> Sub MySub()
>>     Dim cursor as Vcursor
>>     cursor = GetCursor()
>>     cursor = nil
>> End Sub
>>
>> In the first snippet, something is keeping a reference to the cursor
>> until MySub() ends.  In the second snippet the cursor is released as
>> soon as the the cursor = nil line is executed.  I know that this is  
>> the
>> case since the cursor locks records and the locks are not released
>> indicating a reference to the cursor exists somewhere.  It is like a
>> hidden temporary variable exists and is holding a reference to the
>> cursor.
>>
>> This seems to be a bug and was a very tough one to track down!
>>
>> Any one else see anything like this?  Or should I assume insanity on  
>> my
>> part?
>
> Hi Alex,
>
> Can you reproduce this in the small separate project?
> If yes then send to me for check
>
>
> -- 
> Best regards,
> Ruslan Zasukhin      [ I feel the need...the need for speed ]
> -------------------------------------------------------------
> e-mail: ruslan at paradigmasoft.com
> web: http://www.paradigmasoft.com
>
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