Working With Stack Traces
Now it’s time to see how you can use
pbd to inspect the state of variables at any point along the call stack. You can call
w at any time to show a stack trace up to the stack frame you are working at. This is especially helpful if you’re lost.
You can use
d to move up and down the stack trace respectively. When you move into a different stack frame, you can do things like print its local variables.
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