Andrey A. Chernov cd3912b6be The bug:
$ echo x | awk '/[[:cntrl:]]/'
x

The NUL character in cntrl class truncates the pattern, and an empty
pattern matches anything. The patch skips NUL as a quick fix.

PR:     195792
Submitted by:   kdrakehp@zoho.com
Approved by:    bwk@cs.princeton.edu (the author)
MFC after:      3 days
2016-09-03 23:04:56 +00:00
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