module namespace not found in mapState() when using store.registerModule()

[sergey-koretsky]

Version

2.3.0

Reproduction link

https://jsfiddle.net/chrisvfritz/50wL7mdz/

Steps to reproduce

add new submodule with store.registerModule( MODULE_PREFIX, {...})
then try:

computed: {
	...mapState( MODULE_PREFIX, [
		'someObject',
	]),
}

What is expected?

normal behavior

What is actually happening?

an error with the message:
[vuex] module namespace not found in mapState()

[ktsn]

Please provide a real reproduction.

[ktsn]

Closing for inactivity. If you can follow up information or provide a reproduction, please open a new issue.