496099 - Unfolding headers with adjacent escaped parts discards whitespace

Status: NEW

(Thunderbird :: Mail Window Front End, defect)

Description

[Guido Flohr]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; de; rv:1.9.0.10) Gecko/2009051316 Gentoo Firefox/3.0.10
Build Identifier: Version 2.0.0.21 (20090423)

Take the following minimal eml file:

--- snip ---
Subject: =?utf-8?Q?Two?=
 =?utf-8?Q?Words?=

Body of the mail
--- snap ---

This is rendered as:

  Subject: TwoWords

The space character between the two words is not displayed.  This only happens if both words left and right to the crlf are escaped.

I think the bug is present for years already.

Reproducible: Always

Steps to Reproduce:
1. File->Open the attached "unfoldbug.eml" in thunderbird

Comment 1

[Guido Flohr]

Attachment: Shows wrong unfolding of the Subject: header

Comment 2

[Ludovic Hirlimann [:Usul]]

Confirming the bug with Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1pre) Gecko/20090602 Shredder/3.0b3pre.