bug#56824: 29.0.50; mail-header-parse-address drops the 1st character from the name

[Sam Steingold <sds@gnu.org>]

> * Lars Ingebrigtsen <ynefv@tahf.bet> [2022-07-29 15:36:20 +0200]:
>
> Sam Steingold <sds@gnu.org> writes:
>
>> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=10406
>> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=56422
>>
>> Lars told me to use `mail-header-parse-address' instead of
>> `mail-extract-address-components'.
>
> Well, not exactly.

oops. sorry. ;-)

>> Well, I tried, with a positive effect (thanks Lars!),
>> but here is the 1st time the former is deficient:
>>
>> (mail-header-parse-addresses "Štěpán Němec <stepnem@gmail.com>")
>> ==> (("stepnem@gmail.com" . "těpán Němec"))
>> (mail-extract-address-components "Štěpán Němec <stepnem@gmail.com>")
>> ==> ("Štěpán Němec" "stepnem@gmail.com")
>
> `mail-header-parse-addresses' is for parsing RFC822bis mail addresses.
> "Štěpán Němec <stepnem@gmail.com>" is definitely not one of those.

Hmmm, it _used to be_
--8<---------------cut here---------------start------------->8---
"=?utf-8?B?xaB0xJtww6FuIE7Em21lYw==?= <stepnem@gmail.com>"
--8<---------------cut here---------------end--------------->8---
(is that what RFC822bis specifies?)

but was passed through `mail-decode-encoded-word-string':
--8<---------------cut here---------------start------------->8---
(mail-decode-encoded-word-string "=?utf-8?B?xaB0xJtww6FuIE7Em21lYw==?= <stepnem@gmail.com>")
==> "Štěpán Němec <stepnem@gmail.com>"
--8<---------------cut here---------------end--------------->8---
and then passed on to `mail-header-parse-addresses'.

What is TRT here?

Should I call `mail-header-parse-addresses' _first_ and then
`mail-decode-encoded-word-string'?
Come to think of it, passing _email address_ through
`mail-decode-encoded-word-string' seems unnecessary...

--8<---------------cut here---------------start------------->8---
(mail-header-parse-addresses "=?utf-8?B?xaB0xJtww6FuIE7Em21lYw==?= <stepnem@gmail.com>")
==> (("stepnem@gmail.com" . "=?utf-8?B?xaB0xJtww6FuIE7Em21lYw==?="))
(mail-decode-encoded-word-string "=?utf-8?B?xaB0xJtww6FuIE7Em21lYw==?=")
==> "Štěpán Němec"
--8<---------------cut here---------------end--------------->8---

> You're probably looking for `mail-header-parse-address-lax':
>
> (mail-header-parse-address-lax "Štěpán Němec <stepnem@gmail.com>")
> -> ("stepnem@gmail.com" . "Štěpán Němec")

... Or maybe I should keep the current order of processing and use
`mail-header-parse-address-lax'?

Thank you for your speedy and enlightening reply!

-- 
Sam Steingold (http://sds.podval.org/) on darwin Ns 10.3.2113
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