Inplace updating a sequence with an anchor unsets the anchor

[ashwin1dd]

Describe the bug
Appending to a sequence inplace unsets its anchor.
It shouldn't affect the anchor at all, and should've only affected the sequence.

Version of yq: 4.25.3
Operating system: mac
Installed via: homebrew

Input Yaml
Concise yaml document(s) (as simple as possible to show the bug, please keep it to 10 lines or less)
data1.yml:

 a: &hello
   - x
   - y
 b: *hello

Command
The command you ran:

yq -i '.a += ["z"]' data1.yml

Actual behavior

a:
  - x
  - y
  - z
b: *hello

Expected behavior

a: &hello
  - x
  - y
  - z
b: *hello

Additional context
Add any other context about the problem here.

[mikefarah]

Yep that's a bug - will fix in the next release.

As a workaround, you can do the following:

yq '.a = .a + "z"' file.yaml

[mikefarah]

Sorry github autoclosed - will close when the fix is actually released..

[mikefarah]

Fixed in v4.26.1