commit 3acd9a692ddaf8f24d6d34cb5ccb7c26d057e9b3
author Tom Tromey <tromey@adacore.com> Fri Jun 03 07:59:49 2022 -0600
committer Tom Tromey <tromey@adacore.com> Tue Jul 05 10:28:39 2022 -0600
tree 19216ecf8b1235823b9251f84710982be599e5f8
parent 736918239b16cc2ff57bfc64a982f2f0afc8c0f6

Make 'import gdb.events' work

Pierre-Marie noticed that, while gdb.events is a Python module, it
can't be imported.  This patch changes how this module is created, so
that it can be imported, while also ensuring that the module is always
visible, just as it was in the past.

This new approach required one non-obvious change -- when running
gdb.base/warning.exp, where --data-directory is intentionally not
found, the event registries can now be nullptr.  Consequently, this
patch probably also requires

    https://sourceware.org/pipermail/gdb-patches/2022-June/189796.html

Note that this patch obsoletes

    https://sourceware.org/pipermail/gdb-patches/2022-June/189797.html