KT-1141 No check that object in 'object expression' implements all abstract members of supertype

compiler/testData/codegen/regressions/kt940.kt

@@ -8,6 +8,8 @@ fun box() : String {
             val l2 = o2?.length ?: 0
             return l1 - l2
         }
+
+         override fun equals(obj: Any?): Boolean = obj === this
     }
 
     w.compare("aaa", "bbb")

compiler/testData/diagnostics/tests/declarationChecks/kt1141.jet

@@ -0,0 +1,22 @@
+//KT-1141 No check that object in 'object expression' implements all abstract members of supertype
+//+JDK
+
+package kt1141
+
+public trait SomeTrait {
+    fun foo()
+}
+
+fun foo() {
+    val x = <!ABSTRACT_MEMBER_NOT_IMPLEMENTED!>object<!> : SomeTrait {
+    }
+    x.foo()
+}
+
+object <!ABSTRACT_MEMBER_NOT_IMPLEMENTED!>Rr<!> : SomeTrait {}
+
+class <!ABSTRACT_MEMBER_NOT_IMPLEMENTED!>C<!> : SomeTrait {}
+
+fun foo2() {
+    val <!UNUSED_VARIABLE!>r<!> = <!ABSTRACT_MEMBER_NOT_IMPLEMENTED!>object<!> : Runnable {} //no error
+}