Receiver of a function call '<receiver>.foo()' (where receiver is a
class/object/alias name) might be specified incorrectly - corresponding
[companion] object might not be declared.
Before this commit '<receiver>' was considered to be undefined (null).
As a consequence, import suggestion included all 'foo()' functions from
the search scope.
Now as a value of '<receiver>' we set class/object/alias itself
resulting in an empty import suggestion list.
See org/jetbrains/kotlin/idea/util/CallType.kt:307
(#extractReceiverTypeFrom(descriptor: ClassDescriptor)).
Andrei Klunnyi