Emit ResourceWarning when implicitly terminating a suspended frame?

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2016-11-07.02:50:31.347>
labels = ['3.7', 'performance']
title = 'Emit ResourceWarning when implicitly terminating a suspended frame?'
updated_at = <Date 2017-07-19.09:12:49.442>
user = 'https://github.com/ncoghlan'

bugs.python.org fields:

activity = <Date 2017-07-19.09:12:49.442>
actor = 'jstasiak'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2016-11-07.02:50:31.347>
creator = 'ncoghlan'
dependencies = []
files = []
hgrepos = []
issue_num = 28629
keywords = []
message_count = 11.0
messages = ['280185', '280189', '280193', '280200', '280728', '280736', '280737', '280738', '280752', '280762', '290953']
nosy_count = 6.0
nosy_names = ['ncoghlan', 'vstinner', 'njs', 'martin.panter', 'yselivanov', 'jstasiak']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'resource usage'
url = 'https://bugs.python.org/issue28629'
versions = ['Python 3.7']