Merge pull request #18926 from fengxue-IS/18696

Fix StackWalker.walkWrapperImpl walkState structure access

Author: keithc-ca

runtime/jcl/common/java_lang_StackWalker.cpp

@@ -105,6 +105,7 @@ Java_java_lang_StackWalker_walkWrapperImpl(JNIEnv *env, jclass clazz, jint flags
 	memset(&newWalkState, 0, sizeof(J9StackWalkState));
 	newWalkState.previous = walkState;
 	vmThread->stackWalkState = &newWalkState;
+	walkState = &newWalkState;
 	walkState->walkThread = vmThread;
 	walkState->flags = J9_STACKWALK_ITERATE_FRAMES | J9_STACKWALK_WALK_TRANSLATE_PC
 			| J9_STACKWALK_INCLUDE_NATIVES | J9_STACKWALK_VISIBLE_ONLY;