Add -X flag to report extra compiler diagnostics which migth break compatibility.
Use the flag to unconditionally check constructors without fear of
prematurely evaluating lazy supertypes.
KT-19234
KT-42404
KT-44583
Call checker and declaration checker are used in order to preserve backward compatibility.
Attempt to use classifier usage checker was not good enouth,
since not all errors found with it would actually be reported before.
For example types and constructor calls don't cause supertypes to resolve,
so missing supertypes would not lead to errors in case they are the only use of class name.
Updated tests failing due to missing Java dependencies in superclasses.
- render the whole line where the error/warning points to, if any, and another
line with '^', like other compilers do
- lowercase diagnostic severity
- decapitalize the message if it doesn't start with a proper name
This is the case when you reference a Java class in Kotlin whose superclass is
not resolved. Previously this fact was swallowed by LazyJavaClassDescriptor
leading to mysterious compilation errors
#KT-5129 Fixed
Evgeniy.Zhelenskiy