A malformed map or a duplicate key fails parsing

All 12 scenarios hold

Values that do not open a map capture as plain strings.

expected outcome broken scenario
ScenarioInputParsed type?Error message?
Quoted empty map"[:]"java.lang.String
Missing opening bracket:]java.lang.String
Unexpected leading charactera[:]java.lang.String
Missing closing bracket[:Failed to parse `[:`
Closed by the wrong delimiter[a: b}Failed to parse `[a: b}`
Double opening bracket[[:]Failed to parse `[[:]`
Double closing bracket[:]]Failed to parse `]`
Unexpected trailing character[:]aFailed to parse `a`
Missing element[a:b,]Failed to parse `[a:b,]`
Duplicate keys[a:b, a:c]Duplicate key `a` in map `[a:b, a:c]`
Duplicate quoted key[a:b, "a":c]Duplicate key `a` in map `[a:b, "a":c]`
Same key different value types[a:b, a:[b], a:{b}, a:[b:c]]Duplicate key `a` in map `[a:b, a:[b], a:{b}, a:[b:c]]`