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merge: handle no file parent in backwards merge (issue2364)
authorMatt Mackall <mpm@selenic.com>
Sat, 09 Oct 2010 14:50:20 -0500
changeset 12664 545ec1775021
parent 12663 8269af351a64
child 12665 cf24b6b5517c
merge: handle no file parent in backwards merge (issue2364)
mercurial/merge.py file | annotate | diff | comparison | revisions
tests/test-merge1.t file | annotate | diff | comparison | revisions 
--- a/mercurial/merge.py	Sat Oct 09 14:52:58 2010 -0500
+++ b/mercurial/merge.py	Sat Oct 09 14:50:20 2010 -0500
@@ -276,7 +276,10 @@
             fcl = wctx[f]
             fco = mctx[f2]
             if mctx == actx: # backwards, use working dir parent as ancestor
-                fca = fcl.parents()[0]
+                if fcl.parents():
+                    fca = fcl.parents()[0]
+                else:
+                    fca = repo.filectx(f, fileid=nullrev)
             else:
                 fca = fcl.ancestor(fco, actx)
             if not fca:
--- a/tests/test-merge1.t	Sat Oct 09 14:52:58 2010 -0500
+++ b/tests/test-merge1.t	Sat Oct 09 14:50:20 2010 -0500
@@ -166,3 +166,11 @@
   +This is file b33
   $ hg status
   M b
+
+Test for issue2364
+
+  $ hg up -qC .
+  $ hg rm b
+  $ hg ci -md
+  $ hg revert -r -2 b
+  $ hg up -q -- -2
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