diff --git a/hgext/convert/common.py b/hgext/convert/common.py
--- a/hgext/convert/common.py
+++ b/hgext/convert/common.py
@@ -260,8 +260,10 @@ class converter_sink(object):
         """
         pass
 
-    def hascommit(self, rev):
-        """Return True if the sink contains rev"""
+    def hascommitforsplicemap(self, rev):
+        """This method is for the special needs for splicemap handling and not
+        for general use. Returns True if the sink contains rev, aborts on some
+        special cases."""
         raise NotImplementedError
 
 class commandline(object):
diff --git a/hgext/convert/convcmd.py b/hgext/convert/convcmd.py
--- a/hgext/convert/convcmd.py
+++ b/hgext/convert/convcmd.py
@@ -193,7 +193,7 @@ class converter(object):
         """
         for c in sorted(splicemap):
             if c not in parents:
-                if not self.dest.hascommit(self.map.get(c, c)):
+                if not self.dest.hascommitforsplicemap(self.map.get(c, c)):
                     # Could be in source but not converted during this run
                     self.ui.warn(_('splice map revision %s is not being '
                                    'converted, ignoring\n') % c)
@@ -201,7 +201,7 @@ class converter(object):
             pc = []
             for p in splicemap[c]:
                 # We do not have to wait for nodes already in dest.
-                if self.dest.hascommit(self.map.get(p, p)):
+                if self.dest.hascommitforsplicemap(self.map.get(p, p)):
                     continue
                 # Parent is not in dest and not being converted, not good
                 if p not in parents:
diff --git a/hgext/convert/hg.py b/hgext/convert/hg.py
--- a/hgext/convert/hg.py
+++ b/hgext/convert/hg.py
@@ -253,7 +253,7 @@ class mercurial_sink(converter_sink):
             destmarks[bookmark] = bin(updatedbookmark[bookmark])
         destmarks.write()
 
-    def hascommit(self, rev):
+    def hascommitforsplicemap(self, rev):
         if rev not in self.repo and self.clonebranches:
             raise util.Abort(_('revision %s not found in destination '
                                'repository (lookups with clonebranches=true '
diff --git a/hgext/convert/subversion.py b/hgext/convert/subversion.py
--- a/hgext/convert/subversion.py
+++ b/hgext/convert/subversion.py
@@ -1300,7 +1300,7 @@ class svn_sink(converter_sink, commandli
         self.ui.warn(_('writing Subversion tags is not yet implemented\n'))
         return None, None
 
-    def hascommit(self, rev):
+    def hascommitforsplicemap(self, rev):
         # This is not correct as one can convert to an existing subversion
         # repository and childmap would not list all revisions. Too bad.
         if rev in self.childmap: