Bugs item #1231997, was opened at 2005-07-03 22:31
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Category: DOM
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Bryan Rink (holopoj)
Assigned to: Nobody/Anonymous (nobody)
Summary: Memory leak in sgmlop.SGMLParser.register?
Initial Comment:
The following code runs fine:
from xml.dom.ext.reader import Sgmlop
from xml.parsers import sgmlop
while True:
a = Sgmlop.HtmlParser()
b = sgmlop.SGMLParser()
#a.parser = b
b.register(a)
But if the commented line is uncommented this leaks
memory (very quickly). The garbage collector must be
having trouble with the fact the two objects reference
each other.
This isn't a contrived example, the code above was
adopted from lines 48-51 of
xml.dom.reader.Sgmlop.py:
def initParser(self, parser):
self._parser = parser
self._parser.register(self)
return
And HtmlParser.initParser calls that function like this:
SgmlopParser.initParser(self, sgmlop.SGMLParser())
initParser is called from
xml.ext.dom.reader.HtmlLib.Reader.fromStream which
is how I came across this error. I was parsing many
html documents and creating a new Reader for each
one. There is no problem if I use only one reader, so
that's the solution I will take, but it still seems that the
first snippet of code above should not leak memory.
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