bug#36591: 26.2; Term's pager seems broken

[Noam Postavsky <npostavs@gmail.com>]

Adam Bliss <abliss@gmail.com> writes:

> I hope that this is helpful in tracking down the bug.

Thanks for doing this, it was very helpful.  That commit looks like a
pretty innocent refactoring, but it actually reverses the sense of the
EQ (p->filter, Qt) check, because the pset_filter call is moved earlier.

So the bug can be fixed by adding a single '!'.  Eli, any chance of
having this fix in the release branch?


--- i/src/process.c
+++ w/src/process.c
@@ -1230,7 +1230,7 @@ set_process_filter_masks (struct Lisp_Process *p)
 {
   if (EQ (p->filter, Qt) && !EQ (p->status, Qlisten))
     delete_read_fd (p->infd);
-  else if (EQ (p->filter, Qt)
+  else if (!EQ (p->filter, Qt)
 	   /* Network or serial process not stopped:  */
 	   && !EQ (p->command, Qt))
     add_process_read_fd (p->infd);