invalidate when we need to read the caller frame

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/frame/ReadCallerFrameNode.java

@@ -149,7 +149,7 @@ private PFrame.Reference walkLevels(VirtualFrame frame, PFrame.Reference startFr
      * @param level        - the stack depth to go to. Ignored if {@code startFrame} is {@code null}
      */
     public static Frame getCallerFrame(PFrame.Reference startFrame, FrameInstance.FrameAccess frameAccess, boolean skipInternal, int level) {
-        CompilerDirectives.transferToInterpreter();
+        CompilerDirectives.transferToInterpreterAndInvalidate();
         final Frame[] outputFrame = new Frame[1];
         Truffle.getRuntime().iterateFrames(new FrameInstanceVisitor<Frame>() {
             int i = -1;