//ww:run-exit 255
package main;
import fmt;
import io;
export fn main() i32 = {
	let buf: [64]u8;
	let r: (str | io.error) = fmt.bsprintf(buf[0:64], "{9999999999}", 42i64);
	match (r) {
	case let s: str => { return 0; };
	case let e: io.error => { return 1; };
	};
};