460422 - IDN NAMEPREP and Punycode conversion problem for Japanese combining characters

Status: NEW

(Core :: Internationalization, defect)

Description

[Yoshiro YONEYA]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; ja; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; ja; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3

Japanese has two combining characters named voiced-sound mark (U+309B) and semi-voiced-sound mark (U+309C).  Those characters are rarely used independently, but may happen.  When following sequences are typed on address bar, Firefox produces invalid Punycode.

Input                     Output
http://ラフ゛リー.jp/     http://xn-- -wdusizci2i.jp/
       ^^^^^^^^^^ U+30E9 U+30D5 U+309B U+30EA U+30FC
http://ハッヒ゜ー.jp/     http://xn-- -yduvfxbq8w.jp/
       ^^^^^^^^^^ U+30CF U+30C3 U+30D2 U+309C U+30FC

After NFKC, U+309B is normalized as U+0020 U+3099, and U+309C is normalized as U+0020 U+309A as well.  Produced Punycode strings seem including U+0020 that are invalid.


Reproducible: Always

Steps to Reproduce:
See details.
Actual Results:  
See details.

Expected Results:  
Producing invalid Punycode should be avoided.  Such sequences should be warned to users as 'invalid input sequence'.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The bug assignee didn't login in Bugzilla in the last 7 months, so the assignee is being reset.