Why does Valentina crash upon closing a DB?

[Matthew Jew]

On Sep 17, 2006, at 2:46 AM, Ruslan Zasukhin wrote:

> On 9/17/06 12:04 PM, "Matthew Jew" <mjew at icnc.com> wrote:
>
> Hi Matthew,
>
>> My application crashes upon closing a database and I don't understand
>> why.
>>
>> The DB is not corrupted as far as I know. Everything seems to work  
>> well
>> for searching and sorting and things like that.
>> However, when my application tries to close the database, I get a  
>> crash.
>>
>> I have attached the crash log in hopes that you can shed some light
>> on the situation, and tell me what I am doing wrong.
>
> First of all you need make sure that you have destroy any cursor  
> before you
> do close db.
>

I do not use any cursors in any of my applications.

>     We have of course protections from case when you have not  
> delete them,
>     And then db self close them.
>
> Also is not legal case when you have not close db, but do ShutDown.
>
>     We have protection from this.
>
> But may be something is broken, or you have found one more case to  
> crash.
>
>
> -------
> Also, crash log show
>
> 1   libvkernel_fat_release.dylib     0x01cbfa5c void
>                                        fbl::DbStorage::ForEachLink
>
>
> So I wonder, if open your db in Vstudio, and close then no crashes?
> If no, this means that db itself is really good...
>
> Something bad happens during your use...
>
> Links .. May be during some join was born tmp link f1 = f2
> But then again this means some cursor still alive.
>

I don't do any joins either.

Actually, in this application, the only thing I do is API-style  
searches,
using FindBeginsWith (so far).

Of course, I also read data from the DB.

I make no modifications (it would actually be useful to open the DB  
as read-only).
I have other applications that open and close the very same DB (the  
application that creates it, for one).
This one only reads data and does searches.

The strange thing is that both applications share the same code for  
dealing with the DB; that is,
they use the common routines to open, close, make any modifications,  
read data, etc.
The app that crashes is the only one that does searches though.

I assume I am doing something wrong; I just wanted to send the crash  
log to see if the data showed your team
anything that could help narrow down the possibilities.

- Matthew