Error messages which tell you about spelling mistakes or other syntax errors are generated at compile time of your program. No executable is produced and therefore your program doesn't run. A stack overflow condition can only occur when your program has been compiled and started running. The debugger is the tool to be used for analyzing run time errors. You should learn to understand the difference between these to error types.

You are calling your get- and set-properties for "Gold" recursively.

What do you mean by "is failing"?