Note that previously we implicitly ignored JS_IR backend when directive
COMMON_COROUTINES_TEST was enabled, see kotlin/generators/util/coroutines.kt#L57
Both for callables obtained via reflection API (KClass.members etc) and
for callables obtained via ::-references, the instance parameter is now
the class which was used to construct the type at the left-hand side of
the reference, NOT the class where the callable is originally declared
as is known at compile-time. The reason is to reduce the difference in
behavior of KCallable.call vs FunctionN.invoke: the latter always
required the subclass instance for a fake override, and it's reasonable
that the former would require it as well.
Note that in Java reflection, behavior could differ in a similar case.
For a simple fake override, Class.getMethod would return the method
declared in the base class and that method will accept instances of the
base class in invoke. However, it's difficult to rely on this behavior
because if there's a bridge for a fake override in the derived class
(e.g. when overridden members have different signatures), the returned
Method object is accepting the derived class as the receiver. This just
confirms the fact that Java reflection operates on a different level of
abstraction, namely JVM methods in .class files, which is not applicable
to our use cases directly. Another reason not to replicate Java
reflection's behavior is the uncertainty as to which member is returned
in case there are several in the hierarchy for a given fake override:
see the "otherwise one of the methods is chosen arbitrarily" note in
javadoc on Class.getMethod.
#KT-24170 Fixed
It's difficult to fix KT-22818 until the IR comes along, so we're
providing a workaround where one can disable the
ACTUAL_FUNCTION_WITH_DEFAULT_ARGUMENTS error and provide default values
in the actual function, to avoid exception from the backend.
#KT-22818
When we've determined that we are going to invoke an erased inline class
method ('static foo-impl(this, ...)' in inline class), keep track of it
so that the remaining type mapping logic proceeds correctly.
#KT-26998 Fixed Target versions 1.3.20
When mapping callable method signature for erased inline class methods,
use original function descriptor instead of super declaration
(otherwise it would map to a default interface method with mismatching
signature).
When generating delegates to Kotlin default interface methods, keep
track of the original Kotlin types for delegating method arguments and
interface method arguments.
'original' for value parameters of fake overrides points to the
overridden function value parameters instead of the value parameter of
the unsubstituted function. This causes inconsistent type mapping for
inline classes implementing generic interfaces with default methods.
#KT-25295 Fixed Target versions 1.3.20
#KT-26931 Fixed Target versions 1.3.20
Dmitry Petrov