mikemccand commented on PR #12750:
URL: https://github.com/apache/lucene/pull/12750#issuecomment-1820713053
This looks like the root cause?:
```
java.lang.AssertionError: inconsistent endOffset 1 pos=0 posLen=1
token=/a/b expected:<2> but was:<4>
```
Indeed I think the issue is a problem with `PathHierarchyTokenizer`: it
produces tokens all on top of one another (instead of in sequence at
incrementing positions) yet the tokens claim different start/end offsets, and
`BaseTokenStreamTestCase` detects that as a corrupt token graph. I think this
tokenizer should be setting the `PositionLengthAttribute` as well, to indicate
that each token reaches to a further position ... this should make
`BaseTokenStreamTestCase` happy.
See [this blog
post](https://blog.mikemccandless.com/2012/04/lucenes-tokenstreams-are-actually.html)
for more details about how `TokenStream`s are actually graphs in Lucene.
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