[Xapian-tickets] [Xapian] #448: Allow usage of custom stemmers

[Xapian]

#448: Allow usage of custom stemmers
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 Reporter:  esizikov     |        Owner:  olly    
     Type:  enhancement  |       Status:  reopened
 Priority:  normal       |    Milestone:  1.2.1   
Component:  Library API  |      Version:  1.0.17  
 Severity:  normal       |   Resolution:          
 Keywords:               |    Blockedby:          
 Platform:  All          |     Blocking:          
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Comment(by richard):

 I suspect you weren't seeing the SEGV lower down purely by chance, because
 the memory in use had been freed but not yet overwritten.

 I've applied a change (r14739) which fixes this problem, for python at
 least.  The fix is the same as numerous other such fixes in
 python/extra.i; for python subclasses of Director classes, there are two
 objects: the python object, and the C++ Director subclass.  The reference
 being kept automatically is to the C++ Director subclass, so we need to
 take extra steps to keep a reference to the Python subclass.  Ideally,
 we'd make the C++ Director subclass keep a reference to the corresponding
 Python subclass automatically, but I don't know how to do that, so we have
 the set of hacks in extra.i to do the equivalent explicitly.

 I'm not sure whether this is a problem in other languages - it may be that
 SWIG is setting up the references appropriately automatically, but we
 should really write tests to check.

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Ticket URL: <http://trac.xapian.org/ticket/448#comment:36>
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