Bug #11038: regular expression fail

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.0.0p598 (2014-11-13 revision 48408) [x86_64-linux]
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN

[norti (Norberto Martins)]

the following regexp seems to loop
/^([A-Z0-9_%+-]+\.?)+[^.]@([A-Z0-9-]+\.)+[A-Z]{2,4}$/i

with "ec-mat-charles-perrault-voves-28@ac-orleans-tours"

you can test with:

'ec-mat-charles-perrault-voves-28@ac-orleans-tours' =~ /^([A-Z0-9_%+-]+\.?)+[^.]@([A-Z0-9-]+\.)+[A-Z]{2,4}$/i

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)
• Status changed from Open to Feedback

Seems a backtrack explosion.

Is the ? just after \. really intentional?

[jeremyevans0 (Jeremy Evans)]

• Status changed from Feedback to Closed