font-lock and shell scripts: Raises redisplay errors in highlight pattern:

[T. V. Raman]

Hi,

This has been around for some months now and I've been too lazy
to track down its exact source until now.

Symptom:

When editting shell scripts with font-lock turned on, emacs
raises errors during redisplay -- specifically in functions 

font-lock-apply-syntactic-highlight
font-lock-apply-highlight

Once these errors hit, highlighting doesn't appear to happen
correctly.

-- 
Best Regards,
--raman

      
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