Prohibit unsupported suspend operators

contains/get/set operators don't work properly on both backends

Also add box test checking that 'compareTo' operator works just fine

 #KT-16219 Fixed

compiler/frontend/src/org/jetbrains/kotlin/resolve/TargetPlatform.kt

@@ -84,7 +84,8 @@ private val DEFAULT_DECLARATION_CHECKERS = listOf(
         ReifiedTypeParameterAnnotationChecker(),
         DynamicReceiverChecker,
         DelegationChecker(),
-        KClassWithIncorrectTypeArgumentChecker
+        KClassWithIncorrectTypeArgumentChecker,
+        SuspendOperatorsCheckers
 )
 
 private val DEFAULT_CALL_CHECKERS = listOf(

compiler/frontend/src/org/jetbrains/kotlin/resolve/checkers/SuspendOperatorsCheckers.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2010-2017 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.resolve.checkers
+
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.descriptors.FunctionDescriptor
+import org.jetbrains.kotlin.diagnostics.DiagnosticSink
+import org.jetbrains.kotlin.diagnostics.Errors
+import org.jetbrains.kotlin.lexer.KtTokens
+import org.jetbrains.kotlin.psi.KtDeclaration
+import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.util.OperatorNameConventions
+
+object SuspendOperatorsCheckers : SimpleDeclarationChecker {
+    private val UNSUPPORTED_OPERATOR_NAMES = setOf(
+            OperatorNameConventions.CONTAINS,
+            OperatorNameConventions.GET, OperatorNameConventions.SET
+    )
+
+    override fun check(
+            declaration: KtDeclaration,
+            descriptor: DeclarationDescriptor,
+            diagnosticHolder: DiagnosticSink,
+            bindingContext: BindingContext
+    ) {
+        if (descriptor is FunctionDescriptor && descriptor.isSuspend && descriptor.isOperator &&
+            descriptor.name in UNSUPPORTED_OPERATOR_NAMES) {
+            declaration.modifierList?.getModifier(KtTokens.OPERATOR_KEYWORD)?.let {
+                diagnosticHolder.report(Errors.UNSUPPORTED.on(it, "suspend operator \"${descriptor.name}\""))
+            }
+        }
+    }
+}