Product more useful error output when a non-array is produced

index.js

@@ -3,6 +3,7 @@
 const Promise = require("bluebird");
 const propagateAbort = require("@promistream/propagate-abort");
 const unreachable = require("@joepie91/unreachable")("@promistream/buffer");
+const util = require("util");
 
 module.exports = function bufferStream() {
 	let buffer;
@@ -20,7 +21,11 @@ module.exports = function bufferStream() {
 					return attemptRead(readFunc);
 				}
 			} else {
-				throw new Error("Buffered stream produced a non-array value");
+				// FIXME: Make this its own module, and improve its compactness?
+				let stringified = util.inspect(result, { depth: 0 })
+					.replace(/\s+/g, " ");
+
+				throw new Error(`Buffered stream produced a non-array value: ${stringified}`);
 			}
 		});
 	}