Subject that ends with =?utf-8?Q?UTF-8?= =?utf-8?Q?=2C_85_or_A0_=E5=8A?=

[Dennis Preiser]

On Tue, Aug 02, 2022 at 04:04:07PM +0700, Đoàn Trần Công Danh wrote:
> On 2022-08-02 10:06:08+0200, Bastian <bastian-muttuser at t6l.de> wrote:
>> On 02Aug22 15:52+0900, Kenichi Asai wrote:
>> > Would it be possible to somehow avoid this problem?  I cannot avoid
>> > creating e-mails with Japanese characters in Subject and this problem
>> > bugs me quite much.
>> 
>> I think I am not able to reproduce this behavior. I appended 0x52A0 to 
>> the subject line. Can you verify?
> 
> I can't reproduce either.

I can reproduce the issue. In vim the character 0x52a0 is still present:

<http://d--p.de/tmp/2022-08-02_vim.png>

After quitting vim, mutt displays the unicode replacement character
0xfffd instead of 0x52a0:

<http://d--p.de/tmp/2022-08-02_mutt_before_sending.png>

Finally, in the e-mail as such this character has completely
disappeared:

<http://d--p.de/tmp/2022-08-02_mutt_after_sending.png>

| % mutt -v
| Mutt 2.2.6 (2022-06-05)
| Copyright (C) 1996-2022 Michael R. Elkins and others.
| Mutt comes with ABSOLUTELY NO WARRANTY; for details type `mutt -vv'.
| Mutt is free software, and you are welcome to redistribute it
| under certain conditions; type `mutt -vv' for details.
| 
| System: Darwin 21.6.0 (arm64)
| ncurses: ncurses 6.3.20220625 (compiled with 6.3)
| libiconv: 1.16
| hcache backend: lmdb LMDB 0.9.70: (December 19, 2015)
| 
| Compiler:
| Apple clang version 13.1.6 (clang-1316.0.21.2.5)
| Target: arm64-apple-darwin21.5.0
| Thread model: posix
| [...]

Dennis