[Bug server/21454] New: `target extended-remote | gdbserver --multi stdio` uses 100% CPU after gdb quits

["b.r.longbons at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=21454

            Bug ID: 21454
           Summary: `target extended-remote | gdbserver --multi stdio`
                    uses 100% CPU after gdb quits
           Product: gdb
           Version: 7.12
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: server
          Assignee: unassigned at sourceware dot org
          Reporter: b.r.longbons at gmail dot com
  Target Milestone: ---

GNU gdb (Debian 7.12-6) 7.12.0.20161007-git
Copyright (C) 2016 Free Software Foundation, Inc.
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@(gdb) target extended-remote | gdbserver --multi stdio
Remote debugging using | gdbserver --multi stdio
Remote debugging using stdio
@(gdb) set remote exec-file /bin/true
@(gdb) file /bin/true
Reading symbols from /bin/true...(no debugging symbols found)...done.
@(gdb) run
Starting program: /bin/true 
Process /bin/true created; pid = 737
stdin/stdout redirected
Reading /lib64/ld-linux-x86-64.so.2 from remote target...
warning: File transfers from remote targets can be slow. Use "set sysroot" to
access files locally instead.
Reading /lib64/ld-linux-x86-64.so.2 from remote target...
Reading /lib/x86_64-linux-gnu/libc.so.6 from remote target...
[Inferior 1 (process 737) exited normally]
@(gdb) quit

This does *not* happen with TCP targets.

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