key = 'foo'
key.frozen? # => false
TextFieldDefinition.create(key: key)
key.frozen? # => true (not expected)
I created a minimal example to demonstrate the bug this but it does not reproduce it.
It appears that in my production code ActiveModel::Type::ImmutableString#cast_type, which freezes the value, is called, but isn’t in my attempt at a reproduction of the bug.
Any ideas?
I’m assuming Rails shouldn’t modify input’s in any way and should #dup them first.
Many thanks.
