With an object type that keeps the insertion order (ordered_json), a key
such as "/a" can come after "/a/b". The final assignment then replaced the
object built for "/a/b" without an error, so {"/a/b":2,"/a":1} gave
{"a":1}. json never saw this because std::map visits the shorter key first.
Throw type_error.313 if the target of the final assignment is no longer
null, as json does for the same members. A null value keeps the container,
so {"/a/b":2,"/a":null} gives {"a":{"b":2}} for both object types.
Fixes#6105.
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
Niels Lohmann
ad5c9305d5