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matcher: remove an undefined behavior (#10537)

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Indexing into a zero-length std::vector is an undefined behavior.
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Daniël de Kok 2022-03-24 11:48:22 +01:00 committed by GitHub
parent d85117f88c
commit 2ff197603e
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1 changed files with 6 additions and 2 deletions
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8
spacy/matcher/matcher.pyx
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@ -244,8 +244,12 @@ cdef class Matcher:
pipe = "parser" pipe = "parser"
error_msg = Errors.E155.format(pipe=pipe, attr=self.vocab.strings.as_string(attr)) error_msg = Errors.E155.format(pipe=pipe, attr=self.vocab.strings.as_string(attr))
raise ValueError(error_msg) raise ValueError(error_msg)
matches = find_matches(&self.patterns[0], self.patterns.size(), doclike, length,
extensions=self._extensions, predicates=self._extra_predicates, with_alignments=with_alignments) if self.patterns.empty():
matches = []
else:
matches = find_matches(&self.patterns[0], self.patterns.size(), doclike, length,
extensions=self._extensions, predicates=self._extra_predicates, with_alignments=with_alignments)
final_matches = [] final_matches = []
pairs_by_id = {} pairs_by_id = {}
# For each key, either add all matches, or only the filtered, # For each key, either add all matches, or only the filtered,