Minor. Add regression test for KT-18292

#KT-18292: Obsolete

compiler/testData/diagnostics/testsWithStdLib/coroutines/kt18292.kt

@@ -0,0 +1,18 @@
+// SKIP_TXT
+// WITH_RUNTIME
+
+import kotlin.coroutines.experimental.*
+
+interface Job : CoroutineContext.Element {}
+interface Deferred<out T> : Job {
+    suspend fun await(): T
+}
+fun <T> async(<!UNUSED_PARAMETER!>block<!>: suspend () -> T): Deferred<T> = TODO()
+
+suspend fun fib(n: Long) =
+    async {
+        when {
+            n < 2 -> n
+            else -> <!TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM!>fib(n - 1)<!>.<!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>await<!>() <!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>+<!> fib(n - 2).<!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>await<!>()
+        }
+    }

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

@@ -1320,6 +1320,12 @@ public class DiagnosticsTestWithStdLibGenerated extends AbstractDiagnosticsTestW
             doTest(fileName);
         }
 
+        @TestMetadata("kt18292.kt")
+        public void testKt18292() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithStdLib/coroutines/kt18292.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("lambdaExpectedType.kt")
         public void testLambdaExpectedType() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithStdLib/coroutines/lambdaExpectedType.kt");

compiler/tests/org/jetbrains/kotlin/checkers/javac/DiagnosticsTestWithStdLibUsingJavacGenerated.java

@@ -1320,6 +1320,12 @@ public class DiagnosticsTestWithStdLibUsingJavacGenerated extends AbstractDiagno
             doTest(fileName);
         }
 
+        @TestMetadata("kt18292.kt")
+        public void testKt18292() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithStdLib/coroutines/kt18292.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("lambdaExpectedType.kt")
         public void testLambdaExpectedType() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithStdLib/coroutines/lambdaExpectedType.kt");