hg: jdk/sandbox: 8227236: assert(singleton != __null && singleton != declared_interface) failed

[chris.hegarty at oracle.com]

Changeset: bf3fb5465543
Author:    vlivanov
Date:      2019-09-03 17:45 +0300
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/bf3fb5465543

8227236: assert(singleton != __null && singleton != declared_interface) failed
Reviewed-by: dlong

! src/hotspot/share/c1/c1_GraphBuilder.cpp
! src/hotspot/share/ci/ciInstanceKlass.hpp
! src/hotspot/share/opto/doCall.cpp