From 5c7fd50a2d51de1bd76e9233d35effcf69c40b7a Mon Sep 17 00:00:00 2001
From: helloyou2012 <helloyou2012@yeah.net>
Date: Mon, 19 Apr 2021 18:01:49 +0800
Subject: [PATCH] stream: the position of _read() is wrong

Fixes: https://github.com/nodejs/node/issues/33940
---
 lib/internal/fs/streams.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/lib/internal/fs/streams.js b/lib/internal/fs/streams.js
index 57c2304fca82cc..b388bad80c74a5 100644
--- a/lib/internal/fs/streams.js
+++ b/lib/internal/fs/streams.js
@@ -255,6 +255,10 @@ ReadStream.prototype._read = function(n) {
       if (er) {
         errorOrDestroy(this, er);
       } else if (bytesRead > 0) {
+        if (this.pos !== undefined) {
+          this.pos += bytesRead;
+        }
+
         this.bytesRead += bytesRead;
 
         if (bytesRead !== buf.length) {
@@ -271,10 +275,6 @@ ReadStream.prototype._read = function(n) {
         this.push(null);
       }
     });
-
-  if (this.pos !== undefined) {
-    this.pos += n;
-  }
 };
 
 ReadStream.prototype._destroy = function(err, cb) {