bug#34969: 26.2; `emacs -Q` unable to copy \200's eight-bit detail buffer

[Eli Zaretskii]

> From: Van L <van@scratch.space>
> Date: Wed, 27 Mar 2019 16:23:08 +1100
> Cc: 34969@debbugs.gnu.org
> 
> 
> > Eli Zaretskii wrote:
> > 
> >> Emacs was started 7-times and a-f steps performed in each once.
> > 
> > Then what does "the second time above" mean?
> 
> The meaning is the `2nd run of v26.2: emacs` performing 
> a-f steps within the new single instance isolated session.
> 
> : 1 -- 1st run of v26.2: emacs
> : [has *no* problem the 1st run]
> : GNU Emacs 26.2 (build 1, x86_64-apple-darwin15.6.0, X toolkit)
> : of 2019-03-21
> 
> : 4 -- 2nd run of v26.2: emacs <<-- SEE HERE <<--
> : [has problem the 2nd run]
> : GNU Emacs 26.2 (build 1, x86_64-apple-darwin15.6.0, X toolkit)
> : of 2019-03-21

OK, so my initial understanding was correct: you restarted Emacs for
each run.  Then my first suspect would indeed be some software
installed on your system that does something to clipboard contents.