hg: jdk8u/jdk8u-dev/langtools: 8168774: Polymorhic signature method check crashes javac

[maurizio.cimadamore at oracle.com]

Changeset: dc80683c4dd9
Author:    mcimadamore
Date:      2017-01-05 18:58 +0000
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u-dev/langtools/rev/dc80683c4dd9

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

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