Fix regression under Windows following b75b41237380 (from issue #13392)

diff --git a/Python/import.c b/Python/import.c
index 3c3e504e284adaf80087ff6f8445c8ad089925c6..64197d7a48e72ba9e88b2e774ce517a9a3d1c763 100644 (file)
--- a/Python/import.c
+++ b/Python/import.c
@@ -1267,6 +1267,11 @@ write_compiled_module(PyCodeObject *co, PyObject *cpathname,
         PyErr_Clear();
         return;
     }
+    if (PyUnicode_CopyCharacters(cpathname_tmp, 0,
+                                 cpathname, 0, cpathname_len) < 0) {
+        PyErr_Clear();
+        return;
+    }
     PyUnicode_WriteChar(cpathname_tmp, cpathname_len + 0, '.');
     PyUnicode_WriteChar(cpathname_tmp, cpathname_len + 1, 't');
     PyUnicode_WriteChar(cpathname_tmp, cpathname_len + 2, 'm');