Unexpected Behavior When Using Go Channels with Select and Context Timeout
I'm a bit lost with After trying multiple solutions online, I still can't figure this out... I'm encountering an issue with a Go application where I'm trying to implement a timeout mechanism using `context.WithTimeout` along with channels and `select`. The goal is to read from a channel but abort the operation if it takes too long. However, the select statement doesn't seem to handle the timeout scenario correctly, and the goroutine keeps waiting indefinitely. Here is a simplified version of my code: ```go package main import ( "context" "fmt" "time" ) func main() { ch := make(chan string) ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second) defer cancel() go func() { time.Sleep(3 * time.Second) // Simulate work ch <- "done" }() select { case msg := <-ch: fmt.Println("Received:", msg) case <-ctx.Done(): fmt.Println("Timeout:", ctx.Err()) } } ``` I've set up a goroutine to send a message after 3 seconds. The timeout is set to 2 seconds, so I expect the `ctx.Done()` case to trigger, printing a timeout message. Instead, I see the output `Timeout: context deadline exceeded` but the program continues running as if the goroutine is still active. I've verified that the goroutine is indeed still waiting to send a message, which leads me to believe that the channel is blocking. I tried adding a `default` case to the select statement, hoping it would prevent blocking, but that didn't resolve the issue either. Is there a way to ensure that the goroutine terminates or gets cleaned up after the timeout occurs? Or am I missing something fundamental about how channels and context work together? Any insights would be greatly appreciated! I'd really appreciate any guidance on this. The stack includes Go and several other technologies. Any ideas how to fix this? This is for a desktop app running on Windows 11. Is there a better approach?