Backport of "parse/grammar: fix missing unref of looked up child" into 1.22
Backport of !4622 (merged) "parse/grammar: fix missing unref of looked up child".
Commits:
- 9914b34b parse/grammar: fix missing unref of looked up child
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Backport of !4622 (merged) "parse/grammar: fix missing unref of looked up child".
Commits: