# New Ticket Created by Sam S. # Please include the string: [perl #128986] # in the subject line of all future correspondence about this issue. # <URL: https://rt.perl.org/Ticket/Display.html?id=128986 >
S05 <http://design.perl6.org/S05.html#line_2234> says: Backslash escapes for literal characters in ordinary strings are allowed in regexes (\a, \x, etc.). However, the exception to this rule is \b, which is disallowed in order to avoid conflict with its former use as a word boundary assertion. To match a literal backspace, use \c8, \x8, or a double-quoted \b. I found out the hard way today why that second sentence was specced, when I puzzled over a regex of mine for several minutes before I realized that the reason it didn't match, was that I had written my word boundaries as `\b` (Perl/GNU/.NET regex syntax) instead of `<|w>` (Perl 6 regex syntax).
