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qtest_init registers a hook to cleanup the running QEMU process should g_assert() fire before qtest_quit is called. When the first hook is registered, it is supposed to triggere registration of the SIGABRT handler. Unfortunately the logic in hook_list_is_empty is inverted, so the SIGABRT handler never gets registered, unless 2 or more QEMU processes are run concurrently. This caused qtest to leak QEMU processes anytime g_assert triggers. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20220513154906.206715-2-berrange@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>