diff --git a/Lib/importlib/_bootstrap.py b/Lib/importlib/_bootstrap.py
--- a/Lib/importlib/_bootstrap.py
+++ b/Lib/importlib/_bootstrap.py
@@ -87,8 +87,8 @@
     if not sys.platform.startswith('win'):
         # On POSIX-like platforms, renaming is atomic
         path_tmp = path + '.tmp'
+        fd = _os.open(path_tmp, _os.O_EXCL | _os.O_CREAT | _os.O_WRONLY)
         try:
-            fd = _os.open(path_tmp, _os.O_EXCL | _os.O_CREAT | _os.O_WRONLY)
             with _io.FileIO(fd, 'wb') as file:
                 file.write(data)
             _os.rename(path_tmp, path)