fix: ignore invalid gitignore bracket ranges

pathspec/patterns/gitignore/base.py

@@ -161,6 +161,15 @@ def _translate_segment_glob(
 					# as literal slashes by regex as defined by POSIX.
 					expr += pattern[i:j].replace('\\', '\\\\')
 
+					if range_error == 'raise':
+						try:
+							re.compile(expr)
+						except re.error as e:
+							raise _RangeError((
+								f"Invalid range notation={pattern[i:j]!r} found in "
+								f"pattern={pattern!r}."
+							)) from e
+
 					# Add regex bracket expression to regex result.
 					regex += expr
 

tests/test_04_gitignore_spec.py

@@ -944,16 +944,14 @@ def test_15_issue_93_c_2_invalid(self):
 				self.assertIs(pattern.include, None)
 				self.assertIs(pattern.regex, None)
 
-		# The `re` module fails to compile these.
-		# - NOTE: Technically, these should result in null patterns rather than
-		#   exceptions to fully replicate Git's behavior.
 		for raw_pattern in [
 			'[z-a]',
 			'a[z-a]',
 		]:
 			with self.subTest(f"p={raw_pattern!r}"):
-				with self.assertRaises(re_PatternError):
-					GitIgnoreSpecPattern(raw_pattern)
+				pattern = GitIgnoreSpecPattern(raw_pattern)
+				self.assertIs(pattern.include, None)
+				self.assertIs(pattern.regex, None)
 
 	def test_15_issue_93_c_3_unclosed(self):
 		"""