Merge fails with duplicate keys

[stevebleazard]

The following code using merge fails with error
/tmp/pip-req-build-_e_q4qdk/src/c4/yml/tree.cpp:969:check_failed: (has_sibling(node, after) && has_sibling(after, node))

import ryml

src = """
A: &A
    V: 3
B:
    <<: *A
    V: 4
    W: 5
"""
tree = ryml.parse_in_arena(src)
tree.resolve()

Removing the V in B resolves the issue

[biojppm]

Thanks for reporting. Expect some time before this is looked at.