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From: "saemy at optumsoft dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/30160] New: Assertion failure in dummy_frame_pop(frame_id,
 thread_info*)
Date: Thu, 23 Feb 2023 23:12:00 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Product: gdb
X-Bugzilla-Component: gdb
X-Bugzilla-Version: 11.1
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: saemy at optumsoft dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30160

            Bug ID: 30160
           Summary: Assertion failure in dummy_frame_pop(frame_id,
                    thread_info*)
           Product: gdb
           Version: 11.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: saemy at optumsoft dot com
  Target Milestone: ---

Consider the following setup:

(a) Run some process; say with pid 1234
(b) Have the following file "my.gdbscript":
"""
define hook-stop
    call (int) printf("foo")
end
"""

The following then produces an assertion failure on gdb 11.1 and newer (whi=
le
working fine on 10.2):

```
$ gdb --init-command=3Dmy.gdbscript --pid=3D1234
[...]
dummy-frame.c:212: internal-error: void dummy_frame_pop(frame_id,
thread_info*): Assertion `dp !=3D NULL' failed.
[...]
```

In the newer versions there seem to be two calls to `dummy_frame_pop()` for=
 the
same frame_id when there is only one such call in the older versions.
I have added two backtraces to this bug;
(1) bt-both.txt contains the backtrace of the call that is there both in 10=
.2
and 11.1
(2) bt-new.txt contains the backtrace of the additional call that is only
around in 11.1 and newer.

Thank you for your help.

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