Subject: bug#68272: [PATCH] Fix -1 leaking from C to lisp in 'read-event' etc.

From: Eli Zaretskii <[email-masked]>
Date: Tue, 05 Mar 2024 18:55:18 +0200

> From: Stefan Monnier <[email-masked]>
> Cc: Eli Zaretskii <[email-masked]>,  [email-masked]
> Date: Tue, 05 Mar 2024 11:45:41 -0500
> 
> Eli Zaretskii [2024-03-05 15:10:39] wrote:
> > IOW, what about callers that actually _want_ to know when the macro
> > ends prematurely?
> 
> I couldn't find any, really.

??? calc is one, obviously.

> > +	  t = 0;
> > +	  /* The Microsoft C compiler can't handle the goto that
> > +	     would go here.  */
> > +	  dummyflag = true;
> > +	  break;
> > +	}
> 
> This "Microsoft C compiler" business dates back to 1994 (commit
> bc536d847736f466727453ca6aa7c07aef6fce46).
> I think it's safe to clean it up now :-)

The commit and its date don't matter, since we dropped support for
MSVC long ago.  We only support GCC on Windows (at least officially).