1343488 - Dragging message/rfc822 attachment to attachment bucket of new message, and sending, results in garbled new attachment

Status: RESOLVED FIXED

(MailNews Core :: MIME, defect)

Description

[Jorg K (CEST = GMT+2)]

STR:
Attach a BMO message which has CTE quoted-printable to a message and send.
Result 1: message/rfc822 attachment looks good in the preview pane.

Compose a new message and drag the message/rfc822 attachment to the attachment bucket. Send message.
Result 2: message/rfc822 attachment looks garbled.

Analysis:
The message/rfc822 attachment maintains these headers:
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

However, the content is not encoded quoted-printable as originally, but instead 7bit (at least for ASCII messages from BMO). So any = sign in the message body will lead to a decoding error since an attempt to decode the message from quoted-printable is made.

===

Sadly when reporting this bug I noticed another bug:
Double-clicking onto the attachment which has been dragged from a previous message crashes:
https://crash-stats.mozilla.com/report/index/bp-e49fbf9b-7fc3-4024-8fa7-243512170301
https://crash-stats.mozilla.com/report/index/bp-aa5a6b84-2661-47b8-8365-efd0c2170301
That's apparently covered in bug 1316416.

Comment 1

[Jorg K (CEST = GMT+2)]

Fixed by bug 1350080.

Comment 2

[Jorg K (CEST = GMT+2)]

This has got nothing to do with the crash in bug 1316416. Bug 1343536, which has similar steps to reproduce, can create the crash of bug 1316416.