diff --git a/src/land/engine/ArcanistMercurialLandEngine.php b/src/land/engine/ArcanistMercurialLandEngine.php
--- a/src/land/engine/ArcanistMercurialLandEngine.php
+++ b/src/land/engine/ArcanistMercurialLandEngine.php
@@ -116,7 +116,7 @@
           throw new PhutilArgumentUsageException(
             pht(
               'Symbol "%s" is ambiguous.',
-              $symbol));
+              $raw_symbol));
         }
 
         $marker = head($named_markers);
@@ -493,6 +493,7 @@
   }
 
   protected function selectIntoCommit() {
+    $api = $this->getRepositoryAPI();
     $log = $this->getLogEngine();
 
     if ($this->getIntoEmpty()) {
@@ -508,7 +509,6 @@
     if ($this->getIntoLocal()) {
       // If we're running under "--into-local", just make sure that the
       // target identifies some actual commit.
-      $api = $this->getRepositoryAPI();
       $local_ref = $this->getIntoRef();
 
       // TODO: This error handling could probably be cleaner, it will just
@@ -834,7 +834,7 @@
 
     try {
       foreach ($body as $command) {
-        $this->newPasthru('%Ls', $command);
+        $this->newPassthru('%Ls', $command);
       }
     } finally {
       foreach ($tail as $command) {
diff --git a/support/hg/arc-hg.py b/support/hg/arc-hg.py
--- a/support/hg/arc-hg.py
+++ b/support/hg/arc-hg.py
@@ -31,9 +31,9 @@
 @command(
   b'arc-ls-markers',
   [(b'', b'output', b'',
-    _('file to output refs to'), _('FILE')),
+    _(b'file to output refs to'), _(b'FILE')),
   ] + cmdutil.remoteopts,
-  _('[--output FILENAME] [SOURCE]'))
+  _(b'[--output FILENAME] [SOURCE]'))
 def lsmarkers(ui, repo, source=None, **opts):
   """list markers
 
@@ -166,7 +166,7 @@
       'isClosed': False,
       'isTip': False,
       'isCurrent': True,
-      'description': repo['.'].description(),
+      'description': repo[b'.'].description(),
     })
 
   return markers
@@ -181,7 +181,7 @@
   remote = hg.peer(repo, opts, source)
 
   with remote.commandexecutor() as e:
-    branchmap = e.callcommand('branchmap', {}).result()
+    branchmap = e.callcommand(b'branchmap', {}).result()
 
   for branch_name in branchmap:
     for branch_node in branchmap[branch_name]:
@@ -189,11 +189,12 @@
         'type': 'branch',
         'name': branch_name,
         'node': node.hex(branch_node),
+        'description': None,
       })
 
   with remote.commandexecutor() as e:
-    remotemarks = bookmarks.unhexlifybookmarks(e.callcommand('listkeys', {
-      'namespace': 'bookmarks',
+    remotemarks = bookmarks.unhexlifybookmarks(e.callcommand(b'listkeys', {
+      b'namespace': b'bookmarks',
     }).result())
 
   for mark in remotemarks:
@@ -201,6 +202,7 @@
       'type': 'bookmark',
       'name': mark,
       'node': node.hex(remotemarks[mark]),
+      'description': None,
     })
 
   return markers