Fix error handling in Stream::getContents()

src/Stream.php

@@ -260,11 +260,23 @@ public function getContents(): string
             throw new \RuntimeException('Stream is detached');
         }
 
-        if (false === $contents = @\stream_get_contents($this->stream)) {
-            throw new \RuntimeException('Unable to read stream contents: ' . (\error_get_last()['message'] ?? ''));
-        }
+        $exception = null;
+
+        \set_error_handler(static function (string $type, string $message, string $file, int $line) use (&$exception): bool {
+            throw $exception = new \RuntimeException('Unable to read stream contents: ' . $message);
+        });
 
-        return $contents;
+        try {
+            return \stream_get_contents($this->stream);
+        } catch (\Throwable $e) {
+            if ($e === $exception) {
+                throw $e;
+            }
+
+            throw new \RuntimeException('Unable to read stream contents: ' . $e->getMessage(), 0, $e);
+        } finally {
+            \restore_error_handler();
+        }
     }
 
     /**