stream: prevent object map change in TransformState

TransformState has the writeencoding property that gets set on the first _write. It is not declared when the transform state is initially constructed and can cause a deopt. PR-URL: nodejs#5032 Reviewed-By: Brian White <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: James M Snell <[email protected]>
Trott · Feb 2, 2016 · cb51688 · cb51688
1 parent b0b4aeb
commit cb51688
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/lib/_stream_transform.js b/lib/_stream_transform.js
@@ -58,6 +58,7 @@ function TransformState(stream) {
   this.transforming = false;
   this.writecb = null;
   this.writechunk = null;
+  this.writeencoding = null;
 }
 
 function afterTransform(stream, er, data) {