compileall should exit nonzero for nonexistent directories

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-06-18.20:59:37.596>
labels = ['type-bug', 'library']
title = 'compileall should exit nonzero for nonexistent directories'
updated_at = <Date 2021-06-21.02:58:08.691>
user = 'https://github.com/asmeurer'

bugs.python.org fields:

activity = <Date 2021-06-21.02:58:08.691>
actor = 'jacobtylerwalls'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2021-06-18.20:59:37.596>
creator = 'asmeurer'
dependencies = []
files = []
hgrepos = []
issue_num = 44455
keywords = []
message_count = 1.0
messages = ['396087']
nosy_count = 1.0
nosy_names = ['asmeurer']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue44455'
versions = []