Breaking change in v4.40.1 pre-release - explode (merge using anchors) no longer works

[kirici]

Describe the bug
A clear and concise description of what the bug is.

Note that any how to questions should be posted in the discussion board and not raised as an issue.

Version of yq: 4.40.1
Operating system: Linux 6.5.6-300.fc39.x86_64
Installed via: go install github.com/mikefarah/yq/v4@v4.40.1 (also tested using latest (currently 79a50b9))

Input Yaml

template.yaml:

.defaults: &defaults
  pantry: [sauce]
options:
- &lunch
  protein: meat
- &dinner
  protein: eggs
---
# 1.
<<: *defaults
buy:
- *lunch
---
# 2.
<<: *defaults
buy:
- *lunch
- *dinner

Command
The command you ran:

yq 'explode(.) | select(di == 2)' template.yaml

Actual behavior

buy:
  - *lunch
  - *dinner

Expected behavior

pantry: [sauce]
buy:
  - protein: meat
  - protein: eggs

Additional context
Working up until v4.35.2

[mikefarah]

Hey thanks for raising, I'm looking into this

[kirici]

Just noticed that I forgot to paste the actual bug description, sorry 😅
Tested the fix in my actual project via go install github.com/mikefarah/yq/v4@c7ef94603155dee1f1a73c20f2350a989b726bd9 and it seems to be all fixed.
Thanks for the immediate response.