diff --git a/core/tasks/check_boot_jars/package_whitelist.txt b/core/tasks/check_boot_jars/package_whitelist.txt
index daf13fe..601017b 100644
--- a/core/tasks/check_boot_jars/package_whitelist.txt
+++ b/core/tasks/check_boot_jars/package_whitelist.txt
@@ -67,6 +67,8 @@
 org\.w3c\.dom\.ls
 org\.w3c\.dom\.traversal
 # OpenJdk internal implementation.
+sun\.invoke\.util
+sun\.invoke\.empty
 sun\.misc
 sun\.util.*
 sun\.text.*
diff --git a/tools/atree/atree.cpp b/tools/atree/atree.cpp
index b134e01..7deca7e 100644
--- a/tools/atree/atree.cpp
+++ b/tools/atree/atree.cpp
@@ -92,7 +92,7 @@
 
 // Escape the filename so that it can be added to the makefile properly.
 static string
-escape_filename(const string name)
+escape_filename(const string& name)
 {
     ostringstream new_name;
     for (string::const_iterator iter = name.begin(); iter != name.end(); ++iter)