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fix(NODE-5901): propagate errors to transformed stream in cursor #3985

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Feb 13, 2024
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8 changes: 7 additions & 1 deletion src/cursor/abstract_cursor.ts
Original file line number Diff line number Diff line change
Expand Up @@ -337,7 +337,7 @@ export abstract class AbstractCursor<
const transform = options.transform;
const readable = new ReadableCursorStream(this);

return readable.pipe(
const transformedStream = readable.pipe(
new Transform({
objectMode: true,
highWaterMark: 1,
Expand All @@ -351,6 +351,12 @@ export abstract class AbstractCursor<
}
})
);

// Bubble errors to transformed stream, because otherwise no way
// to handle this error.
readable.on('error', err => transformedStream.emit('error', err));

return transformedStream;
}

return new ReadableCursorStream(this);
Expand Down