# HG changeset patch
# User Matt Harbison <matt_harbison@yahoo.com>
# Date 2021-09-20 15:05:30
# Node ID 376d08ae904fc7ec088404b0ac16921dab361554
# Parent  406a7e62994674e4292ef5b49d8d60e612e15675

util: eliminate the possibility of returning None from `versiontuple()`

This fixes the following error flagged by pytype:

    File "/mnt/c/Users/Matt/hg/mercurial/extensions.py", line 228, in load: unsupported operand types for > [unsupported-operands]
      Primitive types 'Optional[tuple]' and 'curver: Optional[tuple]' are not comparable.

Differential Revision: https://phab.mercurial-scm.org/D11473

diff --git a/mercurial/util.py b/mercurial/util.py
--- a/mercurial/util.py
+++ b/mercurial/util.py
@@ -1225,6 +1225,8 @@ def versiontuple(v=None, n=4):
     if n == 4:
         return (vints[0], vints[1], vints[2], extra)
 
+    raise error.ProgrammingError(b"invalid version part request: %d" % n)
+
 
 def cachefunc(func):
     '''cache the result of function calls'''