Properly proxy all methods in TimeoutCoroutine stackframe machinery

Author: qwwdfsad

kotlinx-coroutines-core/common/src/Timeout.kt

@@ -83,8 +83,8 @@ private open class TimeoutCoroutine<U, in T: U>(
     @JvmField val uCont: Continuation<U> // unintercepted continuation
 ) : AbstractCoroutine<T>(uCont.context, active = true), Runnable, Continuation<T>, CoroutineStackFrame {
     override val defaultResumeMode: Int get() = MODE_DIRECT
-    override val callerFrame: CoroutineStackFrame? get() = (uCont as? CoroutineStackFrame)?.callerFrame
-    override fun getStackTraceElement(): StackTraceElement? = (uCont as? CoroutineStackFrame)?.getStackTraceElement()
+    override val callerFrame: CoroutineStackFrame? get() = (uCont as? CoroutineStackFrame)
+    override fun getStackTraceElement(): StackTraceElement? = null
     @Suppress("LeakingThis", "Deprecation")
     override fun run() {
         cancel(TimeoutCancellationException(time, this))