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patch 8.1.0751: some regexp errors are not tested
Problem: Some regexp errors are not tested. Solution: Add a test function.
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@@ -72,3 +72,15 @@ func Test_backref()
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call assert_fails('call search("\\%#=2\\(e\\1\\)")', 'E65:')
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bwipe!
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endfunc
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func Test_multi_failure()
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set re=1
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call assert_fails('/a**', 'E61:')
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call assert_fails('/a*\+', 'E62:')
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call assert_fails('/a\{a}', 'E554:')
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set re=2
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call assert_fails('/a**', 'E871:')
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call assert_fails('/a*\+', 'E871:')
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call assert_fails('/a\{a}', 'E870:')
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set re=0
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endfunc
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