Merge pull request #106 from gogobd/master

Fixing #83
zopefoundation · Jul 9, 2021 · 80cafd4 · 80cafd4
2 parents 22897b3 + 20f15d3
commit 80cafd4
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diff --git a/CHANGES.rst b/CHANGES.rst
@@ -4,6 +4,7 @@ Changelog
 2.1.3 (unreleased)
 ------------------
 
+- Fix Issue #83 where empty Versions caused an Error [gogobd]
 
 2.1.2 (2021-07-02)
 ------------------

diff --git a/src/Products/GenericSetup/registry.py b/src/Products/GenericSetup/registry.py
@@ -435,7 +435,7 @@ def registerStep(self, id, version=None, handler=None, dependencies=(),
         if handler is None:
             raise ValueError('No handler specified')
 
-        if already and already['version'] > version:
+        if already and already['version'] and already['version'] > version:
             raise KeyError('Existing registration for step %s, version %s'
                            % (id, already['version']))