Python 3.6 has a new C calling convention: "fast calls".

python-gdb.py was disabled when compact dict was merged, see issue #27350.

Sadly, I missed that fast calls also broke python-gdb.py.

Attached patch fixes python-gdb.py, but I failed to fix test_gdb.py. With fast calls and patched python-gdb.py, python-gdb.py is now able to detect the Python frame of the call to the builtin id() function. It's a new feature compared to Python 3.5, but test_gdb.py should be updated to handle that.

I will try to fix that later, but in the meanwhile I was interrupted because the fix for compact dict in python-gdb.py failed on buildbots, see:
http://bugs.python.org/issue28023#msg281464

New changeset 752863f96fb8 by Victor Stinner in branch 'default':
Issue #28770: Update python-gdb.py for fastcalls
https://hg.python.org/cpython/rev/752863f96fb8

I keep the issue open until the 3.6 branch is reopened for regular bug fixes, like this one. Then I will backport the fix to 3.6.

3.6 branch is reopened

New changeset f41d02d7da37 by Victor Stinner in branch '3.6':
Issue #28770: Update python-gdb.py for fastcalls
https://hg.python.org/cpython/rev/f41d02d7da37

I fixed the issue in Python 3.6 (future 3.6.1).

The change was cherry-picked in Python 3.6.0RC2.

The issue is now fixed, so I close the issue.

Please leave this open until the cherry picking is completed.

New changeset b0efa88c4cf4 by Victor Stinner in branch '3.6':
Issue #28770: Update python-gdb.py for fastcalls
https://hg.python.org/cpython/rev/b0efa88c4cf4

[cherrypicked for 3.6.0rc2]