Subject: bug#48409: Text runs away before user can copy it

From: Eli Zaretskii <[email-masked]>
Date: Tue, 18 May 2021 22:05:03 +0300

> Date: Tue, 18 May 2021 18:42:16 +0000
> Cc: Juri Linkov <[email-masked]>, [email-masked]
> From: Alan Mackenzie <[email-masked]>
> 
> How can a simple stationary click in the echo area become a drag event?
> I'm guessing there's some subtle bug in some function such as
> make_lispy_event in keyboard.c.  Any mouse experts who have suggestions,
> please chime in, here!

I think this is explained at the end of the node "Drag Events" in the
ELisp manual.