# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@ens-lyon.org>
# Date 1486049597 -3600
# Node ID 5217c745bb60482f8511015ce1854fc57a7b3417
# Parent  54120614e9e50bd05ee013bacf5197c9c1886fdc
evolve: extend API fix from 25254b2f8116 to another relevant case

For some reason, only part of this API change got fixes. Test did not caught
this because 'False' is a valid revision number (0) and update force did not
mind using it as an ancestors. The API changed in Mercurial 43c00ca887d1

diff -r 54120614e9e5 -r 5217c745bb60 README
--- a/README	Wed Feb 01 16:19:58 2017 +0100
+++ b/README	Thu Feb 02 16:33:17 2017 +0100
@@ -56,6 +56,10 @@
 Changelog
 =========
 
+5.6.1 -- 2017-02-28
+
+ - fix a crash that sometime happened when evolving merges.
+
 5.6.0 -- 2017-02-01
 
  - compatibility with Mercurial 4.1.
diff -r 54120614e9e5 -r 5217c745bb60 hgext/evolve.py
--- a/hgext/evolve.py	Wed Feb 01 16:19:58 2017 +0100
+++ b/hgext/evolve.py	Thu Feb 02 16:33:17 2017 +0100
@@ -4146,7 +4146,19 @@
     """Used by the evolve function to merge dest on top of pctx.
     return the same tuple as merge.graft"""
     if repo['.'].rev() != dest.rev():
-       merge.update(repo, dest, False, True, False)
+        #assert False
+        try:
+            merge.update(repo,
+                         dest,
+                         branchmerge=False,
+                         force=True)
+        except TypeError:
+            # Mercurial  < 43c00ca887d1 (3.7)
+            merge.update(repo,
+                         dest,
+                         branchmerge=False,
+                         force=True,
+                         partial=False)
     if bmactive(repo):
        repo.ui.status(_("(leaving bookmark %s)\n") % bmactive(repo))
     bmdeactivate(repo)