[8u20] request for approval to backport JDK-8043725: javac fails with StackOverflowException

[Maurizio Cimadamore]

Hello,

I'd like to ask for an approval to backport fix for:

Bug: https://bugs.openjdk.java.net/browse/JDK-8043725
Backport bug: https://bugs.openjdk.java.net/browse/JDK-8046347
jdk9 fix: http://hg.openjdk.java.net/jdk9/dev/langtools/rev/a8ebc1d5cde9

The fix does *not* apply cleanly to: 
http://hg.openjdk.java.net/jdk8u/jdk8u-dev/langtools because of some 
changes in JDK 9 that have not made into 8. However those changes are 
outside the context of the patch itself - and the code of the proposed 
backport is exactly the same as in 9. To be extra sure I checked that 
all reg tests still pass on the 'adapted' patch.

Thanks
Maurizio