Test for KT-2082 Missing 'Unused expression' warning

#KT-2082 obsolete

compiler/testData/diagnostics/testsWithStdLib/regression/kt2082.kt

@@ -0,0 +1,10 @@
+fun foo(c : Collection<String>) = {
+    c.filter{
+        val s : String? = bar()
+        if (s == null) <!UNUSED_EXPRESSION!>false<!> // here!
+        zoo(<!TYPE_MISMATCH!>s<!>)
+    }
+}
+
+fun bar() : String? = null
+fun zoo(<!UNUSED_PARAMETER!>s<!> : String) : Boolean = true

compiler/testData/diagnostics/testsWithStdLib/regression/kt2082.txt

@@ -0,0 +1,5 @@
+package
+
+internal fun bar(): kotlin.String?
+internal fun foo(/*0*/ c: kotlin.Collection<kotlin.String>): () -> kotlin.List<kotlin.String>
+internal fun zoo(/*0*/ s: kotlin.String): kotlin.Boolean

compiler/tests/org/jetbrains/kotlin/checkers/JetDiagnosticsTestWithStdLibGenerated.java

@@ -729,6 +729,12 @@ public class JetDiagnosticsTestWithStdLibGenerated extends AbstractJetDiagnostic
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithStdLib/regression/ea65206.kt");
             doTest(fileName);
         }
+
+        @TestMetadata("kt2082.kt")
+        public void testKt2082() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithStdLib/regression/kt2082.kt");
+            doTest(fileName);
+        }
     }
 
     @TestMetadata("compiler/testData/diagnostics/testsWithStdLib/reified")