fix: preserve empty slices in OmitEmpty for schema validation#873
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OmitEmpty returned a nil slice for empty []any{} inputs, which then
serialised as `null` during schema.Validate's JSON round-trip and
broke validation for empty YAML lists (e.g. `cache_to: []`).
Fixes docker/buildx#3849
Signed-off-by: Guillaume Lours <glours@users.noreply.github.com>
ndeloof
approved these changes
May 18, 2026
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OmitEmpty returned a nil slice for empty []any{} inputs, which then serialised as
nullduring schema.Validate's JSON round-trip and broke validation for empty YAML lists (e.g.cache_to: []).Fixes docker/buildx#3849