Improve debug output for writables

index.js

@@ -91,12 +91,16 @@ function fromWritable(stream) {
 	// NOTE: The use of `var` is intentional, to make hoisting possible here; otherwise we'd have a broken cyclical reference
 	var writable = wireUpWritableInterface(stream, {
 		onEnd: () => {
+			debugWritable(`Underlying stream has reported a close event (upstreamHasEnded = ${upstreamHasEnded})`);
+
 			if (!upstreamHasEnded) {
+				debugWritable(`Issuing happy abort on converted stream`);
 				convertedStream.abort(true, mostRecentSource);
 			}
 		},
 		onError: (error) => {
 			// Make sure we notify the pipeline, if any, by passing in the most recent source stream that we've seen.
+			debugWritable(`Issuing error abort on converted stream due to: ${error.message}`);
 			convertedStream.abort(error, mostRecentSource);
 		}
 	});