8019340: varargs-related warnings are meaningless on signature-polymorphic methods such as MethodHandle.invokeExact Summary: Disable certain varargs warnings when compiling polymorphic signature calls Reviewed-by: jjg

8020149: Graph inference: wrong logic for picking best variable to solve Summary: Replace logic for selecting best inference leaf in the graph during an unsticking round Reviewed-by: jjg

8016640: compiler hangs if the generics arity of a base class is wrong Summary: Check.checkCompatibleConcretes hang when javac creates synthetic supertypes for 269 model API Reviewed-by: jjg

7041019: Bogus type-variable substitution with array types with dependencies on accessibility check Summary: call to upperBound() when performing type-variable substitution on element type leads to unsoundness Reviewed-by: jjg