x/playground: missing output in Playground example

[bcmills]

The example program from #21168 (https://play.golang.org/p/XPEU7FoTes) can only exit early if it panics, and ends with an unconditional call to fmt.Println with an int64 argument.

Oddly, with the current Playground version of the Go compiler, it appears to print a blank line instead of the final number:

The gray (rather than red) text at the bottom and lack of a panic dump suggest that the program did, in fact, run to completion, but where is the output?

fmt.Println(n+1) works the same way. With fmt.Println(1), fmt.Println(n*1) or fmt.Println(n,n) I get either "process took too long" or "Error communicating with remote server." It's funny.

[ysmolski]

Right now this program reports "took too long" on play.golang.org.

I ran this program on local playground and it was able to execute in 2 seconds some of the launches. Sometimes it returned "too too long".

[andybons]

I too see this as being reported as “process took too long”. When reducing the constant maxInt so that it returns in under 2 seconds, the output it printed as expected.