Ok, did a bisect, and this bisects to commit 6b4b013f1884 ("mailinfo:
handle in-body header continuations").
The continuation logic is oddly complex, and I can't follow the logic.
But it is completely broken in how it thinks empty lines are somehow
"continuations".
Jonathan?
Linus
On Fri, Mar 31, 2017 at 5:24 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> I think the reason is that the "header continuation line" logic kicks
> in because the lines in the body start with spaces, but that's
> entirely incorrect, since
>
> (a) we're not in an email header
>
> (b) there's an empty line in between anyway, so no way are those body
> lines continuation lines.
>
> I didn't check how far back this goes, I guess I'll do that next. But
> I thought I'd report it here first in case somebody else goes "ahhh".