NullPointerException

[DavePearce]

The following typos generates a NullPointerException with wy:

type Board is { bool[][] cells }

method set(Board b, int x, int y):
    b[y][x] = true

Reported error is:

Exception in thread "main" java.lang.NullPointerException
        at wycc.lang.SyntacticException.outputSourceError(SyntacticException.java:122)
        at wycli.Main.exec(Main.java:253)
        at wycli.Main.main(Main.java:224)

Note that this requires at least a two dimensional array to trigger.