go-playground / validator / 21856889411

74%

v8: 100%

Pull #1530

github

fix: prevent panic in unique validation with nil pointer elements

The `unique` tag panics when validating slices or maps containing nil
pointer elements. This affects three code paths in isUnique: slices
without a field param, slices with a field param (unique=Field), and
maps with pointer values.

The fix safely skips nil elements after reflect.Indirect returns a zero
Value, and treats multiple nil entries as duplicates (not unique).

Fixes #1319

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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