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mercurial/revlog.py
changeset 44054 612225e994ff
parent 44047 de5d34ca01bd
child 44073 b9e174d4ed11 
--- a/mercurial/revlog.py	Fri Jan 10 15:47:39 2020 -0800
+++ b/mercurial/revlog.py	Mon Jan 06 08:08:06 2020 +0100
@@ -592,10 +592,10 @@
         self._storedeltachains = True
 
         self._io = revlogio()
-        if rustrevlog is not None and self.opener.options.get(b'rust.index'):
-            self._io = rustrevlogio()
         if self.version == REVLOGV0:
             self._io = revlogoldio()
+        elif rustrevlog is not None and self.opener.options.get(b'rust.index'):
+            self._io = rustrevlogio()
         try:
             d = self._io.parseindex(indexdata, self._inline)
         except (ValueError, IndexError):
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