fix: unhandle error when parameter is not set in v3 and v5

[rzkytmgr]

source only checks if namespace type is equal to string. The error will be triggered when the namespace type is not equal to string unless the namespace parameter presented as an array.

Thank you,

[broofa]

Can you add a unit test here, to test the undefined / null namespace cases?

[rzkytmgr]

Can you add a unit test here, to test the undefined / null namespace cases?

of course with pleasure, let me work for it.

[broofa]

@ctavan, You okay merging this in this form (with CI tweaked to run on 16.13)? See #619 for details. tl;dr: It's an issue in our example code, not something @rzkytmgr introduced.

[broofa]

@ctavan ping

[ctavan]

Proposed an alternative fix to the CI issue in #621.

I'd prefer to merge that one first to produce a cleaner diff in this PR.

[ctavan]

I think I somehow messed this up while rebasing… I created #622 with the same patch instead.