Warning for unused function literal in do..while

compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ControlStructureTypingVisitor.java

@@ -237,6 +237,7 @@ public class ControlStructureTypingVisitor extends ExpressionTypingVisitor {
             else {
                 facade.getTypeInfo(body, context.replaceScope(context.scope));
             }
+            context.trace.report(UNUSED_FUNCTION_LITERAL.on(function));
         }
         else if (body != null) {
             WritableScope writableScope = newWritableScopeImpl(context, "do..while body scope");

compiler/testData/diagnostics/tests/functionLiterals/unusedLiteral.kt

@@ -0,0 +1,12 @@
+fun unusedLiteral(){
+    <!UNUSED_FUNCTION_LITERAL!>{() ->
+        val <!UNUSED_VARIABLE!>i<!> = 1
+    }<!>
+}
+
+
+fun unusedLiteralInDoWhile(){
+    do<!UNUSED_FUNCTION_LITERAL!>{() ->
+            val <!UNUSED_VARIABLE!>i<!> = 1
+    }<!> while(false)
+}

compiler/tests/org/jetbrains/jet/checkers/JetDiagnosticsTestGenerated.java

@@ -1849,6 +1849,11 @@ public class JetDiagnosticsTestGenerated extends AbstractDiagnosticsTestWithEage
                 doTest("compiler/testData/diagnostics/tests/functionLiterals/kt2906.kt");
             }
             
+            @TestMetadata("unusedLiteral.kt")
+            public void testUnusedLiteral() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/functionLiterals/unusedLiteral.kt");
+            }
+            
         }
         
         @TestMetadata("compiler/testData/diagnostics/tests/generics")