8168774: Polymorhic signature method check crashes javac
Summary: Check for polysig method assumes arity is greater than zero
Reviewed-by: vromero
T6882235.java:10:13: compiler.err.illegal.start.of.expr
T6882235.java:11:15: compiler.err.malformed.fp.lit
T6882235.java:11:18: compiler.err.illegal.start.of.expr
T6882235.java:12:13: compiler.err.illegal.start.of.expr
4 errors