Why do I get "Response was not JSON" on the Rust Playground?

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I am trying to run a simple hello world program on the Rust Playground:

fn main() {
    println!("hello");
}

But all I get is an error:

Response was not JSON: SyntaxError: The string did not match the expected pattern.

What is going on?

1 Answers

This appears to be the symptomatic message displayed if the server-side of the Rust Playground is unresponsive, likely due to either updates or overloaded usage. There isn't much you can do beyond waiting for it to become responsive.

There is a mirror site here (by the playground's primary developer).

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