[issue42866] test test_multibytecodec: Test_IncrementalEncoder.test_subinterp() leaks references

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

Ok, it's now fixed.

To make sure that a heap type can be deleted, it must by a GC type, has a traverse function, and it must track its instances. We should take this in account when we convert static types to heap types. In practice, deleting a type is mostly an issue when we check for reference leak and an instance is kept alive until the last GC collection, at the end of Py_EndInterpreter().

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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<https://bugs.python.org/issue42866>
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