Mousedown on selected highlighted text => Windows crash

[Richard Gaskin]

depstein at att.net wrote:

> I have encountered a situation that crashes Metacard running in Windows XP
> almost always but not invariably.  Here's the pattern:
> 
> 1.  a chunk of text in a field has a backColor (like a yellow highlight)
> 2.  I select some of that backColored chunk using the mouse
> 3.  I press down the mouse on top of the selected, backColored chunk.
> 
> On the Mac, this has never caused a problem.  The mouseDown in step 3
> results in the little rectangular cursor being displayed, indicating the
> program is ready to "drag and drop" my selection whenever I release the
> mouse.  Sometimes this works fine in Windows too.  But most of the time the
> Windows result is that no rectangular cursor appears, and the program crashes
> immediately:
> 
> "mc.exe has generated errors and will be closed by Windows.
> You will need to restart the program.  An error log is being created."
> 
> And Metacard does indeed quit.
> 
> I tried this with the message watcher on, and the crash seems to be triggered
> at "dragStart."  I
> tried it with a breakpoint in my dragStart handler, and the crash happened at
> the end of that 
> handler, where I "pass dragStart."  I tried commenting out my dragStart
> handler.  This did not
> prevent the crash.
> 
> The fact that this does not always happen (and never happens on the Mac) made
> me think the 
> variation might be related to available memory; but I have not found a
> pattern.  On the assumption
> that something in my scripts is the culprit, I've tried to reproduce this bug
> by opening some stacks
> with no scripts, just a lot of text and some yellow highlighting.  I have not
> yet reproduced the bug
> under those laboratory conditions.
> 
> Has anyone experienced something similar?  Does anyone know how to go about
> diagnosing such a problem?

Please post the code so we can verify on our own systems.

-- 
 Richard Gaskin 
 Fourth World Media Corporation
 Developer of WebMerge: Publish any database on any Web site
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