hg: jdk9/sandbox/langtools: 8168774: Polymorhic signature method check crashes javac

[chris.hegarty at oracle.com]

Changeset: 6a79477df95d
Author:    mcimadamore
Date:      2016-10-26 15:41 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/langtools/rev/6a79477df95d

8168774: Polymorhic signature method check crashes javac
Summary: Check for polysig method assumes arity is greater than zero
Reviewed-by: vromero

! src/jdk.compiler/share/classes/com/sun/tools/javac/code/Types.java
+ test/tools/javac/meth/BadPolySig.java