# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@ens-lyon.org>
# Date 1493611056 -7200
# Node ID 9d472b219fb07e011c7a6255c5be47e6fc66229c
# Parent  0a41902879d3235d3e2124618e486a697d5b6a3e
obsolete: use ProgrammingError over assert for volatile set registration

We have ProgrammingError now.

diff -r 0a41902879d3 -r 9d472b219fb0 mercurial/obsolete.py
--- a/mercurial/obsolete.py	Fri Jun 16 10:13:44 2017 -0700
+++ b/mercurial/obsolete.py	Mon May 01 05:57:36 2017 +0200
@@ -1273,7 +1273,9 @@
 def cachefor(name):
     """Decorator to register a function as computing the cache for a set"""
     def decorator(func):
-        assert name not in cachefuncs
+        if name in cachefuncs:
+            msg = "duplicated registration for volatileset '%s' (existing: %r)"
+            raise error.ProgrammingError(msg % (name, cachefuncs[name]))
         cachefuncs[name] = func
         return func
     return decorator