vsop-479 commented on code in PR #13923:
URL: https://github.com/apache/lucene/pull/13923#discussion_r2039417117
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lucene/core/src/java/org/apache/lucene/util/fst/FSTCompiler.java:
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@@ -819,17 +819,11 @@ private void freezeTail(int prefixLenPlus1) throws
IOException {
final UnCompiledNode<T> node = frontier[idx];
final int prevIdx = idx - 1;
final UnCompiledNode<T> parent = frontier[prevIdx];
-
final T nextFinalOutput = node.output;
- // We "fake" the node as being final if it has no
- // outgoing arcs; in theory we could leave it
- // as non-final (the FST can represent this), but
- // FSTEnum, Util, etc., have trouble w/ non-final
- // dead-end states:
-
- // TODO: is node.numArcs == 0 always false? we no longer prune any
nodes from FST:
- final boolean isFinal = node.isFinal || node.numArcs == 0;
+ // If this node has no outgoing arcs, it should be final.
+ assert node.numArcs != 0 || node.isFinal;
+ final boolean isFinal = node.isFinal;
Review Comment:
Actually, `node.isFinal` will be reset to false in `FSTCompiler#compileNode`.
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