yq 3 empty keys do not allow merging of values

[umotif-shorner]

Given the following two files

foo:
    hello: world
    bar:

foo:
    bar:
        baz:
            other: value

If i run yq m one.yaml two.yaml, i get the following:

with yq 2.4.1:

foo:
  bar:
    baz:
      other: value
  hello: world

with yq 3.0.1:

foo:
  hello: world
  bar:

Adding any value to the bar key in the first file results in the correct output, as does removing the bar key from the first file. It seems to be related to bar existing as a key, but not having any dictionary values.

I would expect the functionality from 2.x to be preserved, as this has not been mentioned in the "upgrading from 2.x" page, and seems like a fairly large breaking change.

[mikefarah]

Yeah I had to write my own merge function as the previous library was not going to work (and wouldn't preserve things like formatting and comments). It's not mentioned because it's a bug I didn't pick up :P I'll look into it

[tedslittlerobot]

thanks! I would have a go at fixing it, but while I'd love to get up to scratch with Go, I don't think this is the month i'll have the time to do it...! (sorry - that's me that reported it on another account)

[mikefarah]

Fixed in https://github.com/mikefarah/yq/releases/tag/3.1.2