Help: Fatal Python error: deletion of interned string failed

Jeff Epler jepler at
Fri Apr 23 13:37:19 CEST 2004

This indicates some kind of refcounting problem with interned strings.
(string_dealloc was called for a mortal interned string, but removal of
that string from the dict of interned strings failed for some reason)

If you can find a case where this happens without using third-party
modules like db2, you should file it as a bug on

I have never heard of this error before, so it must be uncommon/hard to
trigger or due to a module that few in the community use.

Interned strings were made mortal in Python 2.3, so this could be a 2.2
vs 2.3 incompatibility in some third-party module.


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