result code = -1
standard error = {
tests/diagnostics/accessors.slang(11): error 31101: accessors other than 'set' must not have parameters
        get(a) { return 0; }
        ^~~
tests/diagnostics/accessors.slang(13): error 31102: a 'set' accessor may not have more than one parameter
        set(a, b) { }
               ^
tests/diagnostics/accessors.slang(18): error 31102: 'set' parameter 'c' has type 'int' which does not match the expected type 'float'
        set(c : int) { }
            ^
}
standard output = {
}