svn: warning: W200017: Property 'svn:mime-type' not found on '<MYFILE>@'
svn: E200000: A problem occurred; see other errors for details
#2 ArcanistSubversionAPI::getSVNProperty(string, string) called at [<arcanist>/src/repository/api/ArcanistSubversionAPI.php:454
...

diff --git a/src/repository/api/ArcanistSubversionAPI.php b/src/repository/api/ArcanistSubversionAPI.php
index 887fa4f..3f8ca98 100644
--- a/src/repository/api/ArcanistSubversionAPI.php
+++ b/src/repository/api/ArcanistSubversionAPI.php
@@ -199,7 +199,7 @@ final class ArcanistSubversionAPI extends ArcanistRepositoryAPI {
 
   public function getSVNProperty($path, $property) {
     list($stdout) = execx(
-      'svn propget %s %s@',
+      'svn propget %s %s@ || true',
       $property,
       $this->getPath($path));
     return trim($stdout);