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mercurial/revlogutils/deltas.py
changeset 39332 6f4b8f607a31
parent 39331 fd0150a3c2fe
child 39333 5d343a24bff5 
--- a/mercurial/revlogutils/deltas.py	Wed Aug 29 09:41:04 2018 -0700
+++ b/mercurial/revlogutils/deltas.py	Thu Aug 16 04:20:34 2018 +0200
@@ -703,6 +703,12 @@
         if not revinfo.textlen:
             return None # empty file do not need delta
 
+        # no delta for flag processor revision (see "candelta" for why)
+        # not calling candelta since only one revision needs test, also to
+        # avoid overhead fetching flags again.
+        if revinfo.flags & REVIDX_RAWTEXT_CHANGING_FLAGS:
+            return None
+
         cachedelta = revinfo.cachedelta
         p1 = revinfo.p1
         p2 = revinfo.p2
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