8200478: For boxing conversion javac uses Long.valueOf which does not guarantee caching according to its javadoc
Reviewed-by: bpb
test/nashorn/script/error/JDK-8098847.js:32:5 Expected ident but found prop
obj."prop" = "hello";
^
test/nashorn/script/error/JDK-8098847.js:33:5 Expected ident but found prop
obj.'prop' = "hello";
^