Bug #11311: STRING::Scan method badly interpret i option - Ruby 2.1.*

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: 2.1.6
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN

[gayahel (Agathe Begault)]

'SKYPE'.scan(/[^aeiouyAEIOUY\W]/i) #returns ["P"] instead of ["S", "K", "P"]

Tested on Ruby 2.1.3 / 2.1.5 / 2.1.6
regexp i option: case insensitive

https://github.com/ruby/ruby/blame/trunk/string.c#L7681

[gayahel (Agathe Begault)]

'SKYPE'.scan(/[^aeiouyAEIOUY\W]/i) #returns ["P"] instead of ["S", "K", "P"]
'SKYPE'.scan(/[^aeiouyAEIOUY\W]/) #returns ["S", "K", "P"]

Tested on Ruby 2.1.3 / 2.1.5 / 2.1.6

regexp i option: case insensitive
https://github.com/ruby/ruby/blame/trunk/string.c#L7681

[cremno (cremno phobia)]

That's a known and documented bug:

/\W/ - A non-word character ([^a-zA-Z0-9_]). Please take a look at Bug #4044 if using /\W/ with the /i modifier.

It has been fixed by Onigmo 5.15.0 / Ruby 2.2. Maybe it can or even should be backported?

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Closed