[8u-dev] request for review and approval to backport JDK-8130304: Inference: NodeNotFoundException thrown with deep generic method call chain

[Maurizio Cimadamore]

Hello,

I'd like to ask for a code review and an approval to backport the 
following fix to 8u-dev:

Bug: https://bugs.openjdk.java.net/browse/JDK-8130304
jdk9 fix: http://hg.openjdk.java.net/jdk9/dev/langtools/rev/70c852df047c

The fix does not apply cleanly to 8u-dev/langtools. A webrev for the 
patch updated for 8u-dev is here:
http://cr.openjdk.java.net/~mcimadamore/8130304/

The changes between the jdk9 and 8u-dev fixes are to adjust some typing 
issues in the TarjanNode class (since the hierarchy has slightly 
different generic type signatures in JDK 9).

Thanks
Maurizio