[Bug server/17302] New: gdbserver function call + detach crashes inferior process

["simon.marchi at ericsson dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17302

            Bug ID: 17302
           Summary: gdbserver function call + detach crashes inferior
                    process
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: server
          Assignee: unassigned at sourceware dot org
          Reporter: simon.marchi at ericsson dot com

Created attachment 7754
  --> https://sourceware.org/bugzilla/attachment.cgi?id=7754&action=edit
Test program

Steps:

1- Build test.c (attached to this post)
    $ gcc -O0 -g3 test.c
2- Start gdbserver (in terminal #1)
    $ gdbserver --multi :1234
3- Start the process (in terminal #2)
    $ ./a.out
    pid = 4397
    ...
4- Start gdb (in terminal #3)
    $ gdb -nx a.out
5- Connect to gdbserver
    (gdb) tar ext :1234
6- Attach the process
    (gdb) attach 4397
7- Call a function
    (gdb) call another_function()
8- Detach the process
    (gdb) detach

The process segfaults when trying to continue its execution.

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