* fixed NoSuchMethod caused by mismatched signatures of the "invoke" method generated for lambda arguments
* added test cases in invoke.kt for KFunction and anonymous functions
* added a transformer to wrap the last expression in the bodies of lambdas with return
Currently FirThisReceiverExpression of instance methods are translated
to references of the class' thisReceiver,
not the method's dispatch receiver,
which causes problems with IrFrameMap::typeOf,
as the class' thisReceiver is not in the typeMap.
This commit translates non-qualified "this" references of
instance methods to references of the methods' dispatch receiver.
This commit fixes two issues in the existing implementation of translating primitive array types:
* IrType.getArrayElementType throws an exception when the receiver is a primitive array type, because IR expects primitive array types use symbols defined in IrBuiltIns, but fir2ir translation doesn't;
* IteratorNext.toCallable assumes all element types are boxed.
The first issue is fixed by changing the fir2ir type translation to use symbols in IrBuiltIns for primitive array types, and the second by not unboxing primitive types.
Mikhail Glukhikh