Minor. Add more tests

compiler/testData/codegen/box/inlineClasses/jvm8DefaultInterfaceMethods/jvmDefaultSuspendGeneric.kt

@@ -0,0 +1,33 @@
+// !JVM_DEFAULT_MODE: all
+// TARGET_BACKEND: JVM
+// WITH_STDLIB
+// JVM_TARGET: 1.8
+// WORKS_WHEN_VALUE_CLASS
+// LANGUAGE: +ValueClasses, +GenericInlineClassParameter
+
+import kotlin.coroutines.*
+
+interface IOk {
+    fun ok(): String = "OK"
+}
+
+OPTIONAL_JVM_INLINE_ANNOTATION
+value class InlineClass<T: String>(val s: T) : IOk
+
+suspend fun returnsUnboxed() = InlineClass("")
+
+suspend fun test(): String = returnsUnboxed().ok()
+
+fun builder(c: suspend () -> Unit) {
+    c.startCoroutine(Continuation(EmptyCoroutineContext) {
+        it.getOrThrow()
+    })
+}
+
+fun box(): String {
+    var res = "FAIL"
+    builder {
+        res = test()
+    }
+    return res
+}