hg: jdk7/tl/langtools: 6979683: inconsistent interaction of reference cast with box/unbox conversions leaves out a useful case

[john.r.rose at oracle.com]

Changeset: d3ead6731a91
Author:    jrose
Date:      2010-09-01 03:19 -0700
URL:       http://hg.openjdk.java.net/jdk7/tl/langtools/rev/d3ead6731a91

6979683: inconsistent interaction of reference cast with box/unbox conversions leaves out a useful case
Summary: Allow casts which narrow and then unbox.
Reviewed-by: mcimadamore

! src/share/classes/com/sun/tools/javac/code/Types.java
! src/share/classes/com/sun/tools/javac/comp/Lower.java
+ test/tools/javac/6979683/TestCast6979683_BAD34.java
+ test/tools/javac/6979683/TestCast6979683_BAD34.java.errlog
+ test/tools/javac/6979683/TestCast6979683_BAD35.java
+ test/tools/javac/6979683/TestCast6979683_BAD35.java.errlog
+ test/tools/javac/6979683/TestCast6979683_BAD36.java
+ test/tools/javac/6979683/TestCast6979683_BAD36.java.errlog
+ test/tools/javac/6979683/TestCast6979683_BAD37.java
+ test/tools/javac/6979683/TestCast6979683_BAD37.java.errlog
+ test/tools/javac/6979683/TestCast6979683_BAD38.java
+ test/tools/javac/6979683/TestCast6979683_BAD38.java.errlog
+ test/tools/javac/6979683/TestCast6979683_BAD39.java
+ test/tools/javac/6979683/TestCast6979683_BAD39.java.errlog
+ test/tools/javac/6979683/TestCast6979683_GOOD.java