[Bug testsuite/29659] New: [gdb/testsuite] local-remote-host timeouts with bracketed-paste

["vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29659

            Bug ID: 29659
           Summary: [gdb/testsuite] local-remote-host timeouts with
                    bracketed-paste
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: testsuite
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

[ Note: not building with system-readline, so picking up the readline version
in the sources. ]

[ Note: There are some problems with the mentioned host boards and/or
test-case, so it may be necessary to first run the test-case with native to
generate some files that will be otherwise not found, and it may be necessary
to do git ch -f to recreate $src/gdb/testsuite/gdb.xml/trivial.xml if running
the test deleted this file. ]

With test-case gdb.server/connect-with-no-symbol-file.exp and host board
local-remote-host-notty, I have:
...
Type "apropos word" to search for commands related to "word".^M
(gdb) set height 0^M
(gdb) set width 0^M
(gdb) disconnect^M
You can't do that when your target is `None'^M
...
but with host board local-remote-host instead I have:
...
Type "apropos word" to search for commands related to "word".^M
^[[?2004h(gdb) set height 0^M
^[[?2004l^M^[[?2004h(gdb) set width 0^M
^[[?2004l^M^[[?2004h(gdb) disconnect^M
^[[?2004l^MYou can't do that when your target is `None'^M
^[[?2004h(gdb) FAIL: gdb.server/connect-with-no-symbol-file.exp: sysroot=:
action=permission: setup: disconnect (timeout)
...

I found that the control sequences ^[[?2004h and ^[[?2004l are related to
bracketed paste mode.

After doing a rebuild with the commit before the readline 8.1 import (which
sets the bracketed-paste mode on by default) and applying commit 8d08cccb014
("Avoid having to unload file in gdb.server/connect-with-no-symbol-file.exp")
to have the same test-case, I have instead:
...
Type "apropos word" to search for commands related to "word".^M
(gdb) set height 0^M
(gdb) set width 0^M
(gdb) disconnect^M
You can't do that when your target is `None'^M
(gdb) PASS: gdb.server/connect-with-no-symbol-file.exp: sysroot=:
action=permission: setup: disconnect
...

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