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