id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	launchpad_bug
4078	intermittant failures / race-condition on immutable.download.fetcher	meejah		"While trying to prepare 1.19.0, some builder exhibited an intermittent failure relating to the `_shares` member of `SegmentFetcher` not being available.

This can only happen due to some code that *claims* to be ""helping the GC"" and appears to be a race condition.

Investigate."	defect	new	normal	undecided	code-storage	n/a