improved error reporting

when error type is a generic parameter

compiler/testData/diagnostics/tests/inference/reportingImprovements/ErrorTypeAsGenericParameter.kt

@@ -0,0 +1,9 @@
+package a
+
+fun <T, R, S> foo(block: (T)-> R, <!UNUSED_PARAMETER!>second<!>: (T)-> S) = block
+
+fun main(args: Array<String>) {
+    val fff = { (x: Int) -> <!UNRESOLVED_REFERENCE!>aaa<!> }
+    foo(<!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>fff<!>, { x -> x + 1 })
+}
+