Issue #7858: Raise an error properly when os.utime() fails under Windows

on an existing file.

(this does not seem to be easily testable)

Misc/NEWS

@@ -30,6 +30,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #7858: Raise an error properly when os.utime() fails under Windows
+  on an existing file.
+
 - Issue #3839: wsgiref should not override a Content-Length header set by
   the application.  Initial patch by Clovis Fabricio.
 

Modules/posixmodule.c

@@ -3256,6 +3256,7 @@ posix_utime(PyObject *self, PyObject *args)
            something is wrong with the file, when it also
            could be the time stamp that gives a problem. */
         win32_error("utime", NULL);
+        goto done;
     }
     Py_INCREF(Py_None);
     result = Py_None;