Re: Deep bug

[Scott Klement <klemscot@xxxxxxxxxxxx>]

Does it still do this with the current development sources?

Can you tell me how to reproduce the problem?



On Tue, 17 Apr 2001, Jason Bechtel wrote:

> Hi all,
> 
> A client of mine using the xt5250 and tn5250 applications compiled from
> source (version 0.15.6) has encountered a reproduceable crash with core
> dump.  From their informal observation, it appears that the problem
> occurs when they are three "screens" deep (you know, those little AS400
> ASCII "windows").  Here is the message that appears when tn5250 is run
> out of a terminal:
> 
>       Assertion tn5250_attribute (attr) failed at wtd.c, line 329.  A
>       borted (core dumped)
> 
> Sure enough, that part of the code looks to be an assertion:
> 
>     298 /****i* lib5250/tn5250_wtd_context_write_field
>     299  * NAME
>     300  *    tn5250_wtd_context_write_field
>     301  * SYNOPSIS
>     302  *    tn5250_wtd_context_write_field (This, field, attr);
>     303  * INPUTS
>     304  *    Tn5250WTDContext *   This       -
>     305  *    Tn5250Field *        field      -
>     306  *    unsigned char        attr       -
>     307  * DESCRIPTION
>     308  *    Write the SF order and the field's information.
>     309  *****/
>     310 static void tn5250_wtd_context_write_field (Tn5250WTDContext
> *This, Tn5250Field *field, unsigned char attr)
>     311 {
>     312    TN5250_LOG (("Writing SF order in stream data.\n"));
>     313 
>     314    tn5250_wtd_context_putc (This, SF);
>     315 
>     316    /* Put the field format word. */
>     317    if (field->FFW != 0) {
>     318       tn5250_wtd_context_putc (This, (unsigned char)(field->FFW
> >> 8));
>     319       tn5250_wtd_context_putc (This, (unsigned char)(field->FFW
> & 0x00ff));
>     320 
>     321       /* Put the field control word(s). */
>     322       if (field->FCW != 0) {
>     323          tn5250_wtd_context_putc (This, (unsigned
> char)(field->FCW >> 8));
>     324          tn5250_wtd_context_putc (This, (unsigned
> char)(field->FCW & 0x00ff));
>     325       }
>     326    }
>     327 
>     328    /* Put the screen attribute. */
> *-> 329    TN5250_ASSERT (tn5250_attribute (attr));
>     330    tn5250_wtd_context_putc (This, attr);
>     331 
>     332    /* Put the field length. */
>     333    tn5250_wtd_context_putc (This, (unsigned char)(field->length
> >> 8));
>     334    tn5250_wtd_context_putc (This, (unsigned char)(field->length
> & 0x00ff));
>     335 }
> 
> 
> Anyone have any ideas what might be causing this error?  Has this
> already been found and solved (new to the list)?  How difficult would
> this be to debug?
> 
> Jason

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