fixup: state object isDuplex

nodejs · Sep 13, 2019 · fbec373 · fbec373
1 parent 35ca570
commit fbec373
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Showing 2 changed files with 6 additions and 0 deletions.
diff --git a/lib/_stream_readable.js b/lib/_stream_readable.js
@@ -73,6 +73,9 @@ function prependListener(emitter, event, fn) {
 }
 
 function ReadableState(options, isDuplex) {
+  if (typeof isDuplex !== 'boolean')
+    isDuplex = stream instanceof Stream.Duplex;
+
   // Object stream flag. Used to make read(n) ignore n and to
   // make all the buffer merging and length checks go away
   this.objectMode = !!(options && options.objectMode);

diff --git a/lib/_stream_writable.js b/lib/_stream_writable.js
@@ -58,6 +58,9 @@ Object.setPrototypeOf(Writable, Stream);
 function nop() {}
 
 function WritableState(options, stream, isDuplex) {
+  if (typeof isDuplex !== 'boolean')
+    isDuplex = stream instanceof Stream.Duplex;
+
   // Object stream flag to indicate whether or not this stream
   // contains buffers or objects.
   this.objectMode = !!(options && options.objectMode);