The text discusses an issue with goroutines and closures in Go programming language. It explains how using goroutines to run concurrently can lead to unexpected results when sharing a single variable across multiple closures, as demonstrated by the output "10 10 10..." instead of numbers from 0 to 9. The solution provided is to create a new variable and pass it as a parameter to the function call within each goroutine, ensuring that each closure has its own copy of the variable. This issue is also mentioned in the Go FAQ.