doc: clarify async iterator leak

nodejs · Aug 9, 2019 · e4de3f0 · e4de3f0
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commit e4de3f0
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diff --git a/doc/api/stream.md b/doc/api/stream.md
@@ -2502,6 +2502,9 @@ and async iterators are provided below.
 })();
 ```
 
+Async iterators register a permanent error handler on the stream to prevent any
+unhandled post-destroy errors.
+
 #### Creating Readable Streams with Async Generators
 
 We can construct a Node.js Readable Stream from an asynchronous generator