Bram Moolenaar 1ef9bbe215 patch 8.0.0645: no error for illegal back reference in NFA engine ...

Problem:    The new regexp engine does not give an error for using a back
            reference where it is not allowed. (Dominique Pelle)
Solution:   Check the back reference like the old engine. (closes #1774)

2017-06-17 20:08:20 +02:00

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