[Bug gdb/26652] Unexpected prompt when using "continue" breakpoint commands and mix of -x and -ex

["simark at simark dot ca" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=26652

--- Comment #1 from Simon Marchi <simark at simark dot ca> ---
Oops, I hit submit too soon, here's the rest.

I have this GDB script:

 b bar
 commands
   print n
   continue
 end

I run GDB like this:

  $ ./gdb -nx --data-directory=data-directory ./test -x script -ex r

I would expect the breakpoint on bar to be hit twice, then the program to exit.
 What I see is:

$ ./gdb -q -nx --data-directory=data-directory ./test -x script -ex r
Reading symbols from ./test...
Breakpoint 1 at 0x4004dd: file test.c, line 3.
Starting program: /home/smarchi/build/binutils-gdb/gdb/test 

Breakpoint 1, bar (n=0) at test.c:3
3       }
(gdb) 


And the execution appears to stop here.  However, if I then type any command
(like print 1), execution appears to resume until the program exits:

(gdb) print 1
$1 = 1
$2 = 0

Breakpoint 1, bar (n=1) at test.c:3
3       }
$3 = 1
[Inferior 1 (process 29906) exited normally]
(gdb) 


So, it looks like some event gets stuck somewhere and doesn't get pulled by
infrun until the event loop is woken up by the command handler.

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