Update IR Runtime

libraries/stdlib/js/irRuntime/core.kt

@@ -85,4 +85,27 @@ fun getNumberHashCode(obj: dynamic) = js("""
     }
 """).unsafeCast<Int>()
 
-fun identityHashCode(obj: dynamic): Int = getObjectHashCode(obj)
+fun identityHashCode(obj: dynamic): Int = getObjectHashCode(obj)
+
+
+@JsName("captureStack")
+internal fun captureStack(instance: Throwable) {
+    if (js("Error").captureStackTrace) {
+        js("Error").captureStackTrace(instance, instance::class.js);
+    } else {
+        instance.asDynamic().stack = js("new Error()").stack;
+    }
+}
+
+@JsName("newThrowable")
+internal fun newThrowable(message: String?, cause: Throwable?): Throwable {
+    val throwable = js("new Error()")
+    throwable.message = if (message == null) {
+        if (cause != null) js("cause.toString()") else null
+    } else {
+        message
+    }
+    throwable.cause = cause
+    throwable.name = "Throwable"
+    return throwable
+}