double-comma-1 = [1,,2]
double-comma-2 = [1,2,,]

only-comma-1 = [,]
only-comma-2 = [,,]

no-comma-1 = [true false]
no-comma-2 = [ 1 2 3 ]
no-comma-3 = [ 1 #,]

no-close-1 = [ 1, 2, 3
no-close-2 = [1,
no-close-3 = [42 #]
no-close-4 = [{ key = 42
no-close-5 = [{ key = 42}
no-close-6 = [{ key = 42 #}]
no-close-7 = [{ key = 42} #]
no-close-8 = [