$ go run errors.go
f1 worked: 10
f1 failed: can't work with 42
f2 worked: 10
f2 failed: 42 - can't work with it
42
can't work with it

# See this [great post](http://blog.golang.org/2011/07/error-handling-and-go.html)
# on the Go blog for more on error handling.