Only report write error when write fails with error and nothing written

Author: clue

src/WritableResourceStream.php

@@ -113,13 +113,8 @@ public function close()
     public function handleWrite()
     {
         $error = null;
-        \set_error_handler(function ($errno, $errstr, $errfile, $errline) use (&$error) {
-            $error = array(
-                'message' => $errstr,
-                'number' => $errno,
-                'file' => $errfile,
-                'line' => $errline
-            );
+        \set_error_handler(function ($_, $errstr) use (&$error) {
+            $error = $errstr;
         });
 
         if ($this->writeChunkSize === -1) {
@@ -130,25 +125,16 @@ public function handleWrite()
 
         \restore_error_handler();
 
-        // Only report errors if *nothing* could be sent.
+        // Only report errors if *nothing* could be sent and an error has been raised.
+        // Ignore non-fatal warnings if *some* data could be sent.
         // Any hard (permanent) error will fail to send any data at all.
         // Sending excessive amounts of data will only flush *some* data and then
         // report a temporary error (EAGAIN) which we do not raise here in order
         // to keep the stream open for further tries to write.
         // Should this turn out to be a permanent error later, it will eventually
         // send *nothing* and we can detect this.
-        if ($sent === 0 || $sent === false) {
-            if ($error !== null) {
-                $error = new \ErrorException(
-                    $error['message'],
-                    0,
-                    $error['number'],
-                    $error['file'],
-                    $error['line']
-                );
-            }
-
-            $this->emit('error', array(new \RuntimeException('Unable to write to stream: ' . ($error !== null ? $error->getMessage() : 'Unknown error'), 0, $error)));
+        if (($sent === 0 || $sent === false) && $error !== null) {
+            $this->emit('error', array(new \RuntimeException('Unable to write to stream: ' . $error)));
             $this->close();
 
             return;