1211257 - RegExp pattern validation does not work correctly

Status: RESOLVED INCOMPLETE

(Core :: JavaScript Engine, defect)

Description

[rej-scheijen]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:41.0) Gecko/20100101 Firefox/41.0
Build ID: 20150918100310

Steps to reproduce:

When creating a form with with a pattern validation (Dutch postall check) I noticed that the pattern validation was not working correctly.
It did on Chromium and on Opera.
The problem seems to be in the {[amount]} operator

This works : [1-9][0-9][0-9][0-9]\s?\w\w
This does not : [1-9][0-9]{3}\s?\w{2}


Actual results:

The value in the field was marked invalid (my own postal code)

Happens in Firefox 41
Happens in nightly build


Expected results:

The value should have been marked as valid.
All combinations with a {[amount]} operator in it seems to be faulty

Comment 1

[Tooru Fujisawa [:arai]]

Can you post a testcase, including input data and the actual JavaScript code?

Comment 2

[Boris Zbarsky [:bzbarsky]]

In particular, what actual string are you typing in?

When I try this testcase: data:text/html,<input pattern="[1-9][0-9]{3}\s?\w{2}">

and type in "1234ab", it's correctly flagged as valid...

Comment 3

[rej-scheijen]

Hmmm never mind.
This will be a bugreport for the template parser of the framework.
For some reason he thinks that the {3} and {2} are unused template variables and removes them just before sending the page.

Comment 4

[Boris Zbarsky [:bzbarsky]]

How did things work in Chrome/Opera then?

Comment 5

[Jonathan Watt [:jwatt]]

Mass bug change to replace various 'parity' whiteboard flags with the new canonical keywords. (See bug 1443764 comment 13.)