Dir.mktmpdir workarounds - you may need to adjust tmp dir path to `echo $TMPDIR`

mktmpdir.patch

diff --git a/lib/ruby/stdlib/tmpdir.rb b/lib/ruby/stdlib/tmpdir.rb
index 9ba06d5..5b4b143 100644
--- a/lib/ruby/stdlib/tmpdir.rb
+++ b/lib/ruby/stdlib/tmpdir.rb
@@ -30,11 +30,11 @@ class Dir
       for dir in [ENV['TMPDIR'], ENV['TMP'], ENV['TEMP'], @@systmpdir, '/tmp', '.']
         next if !dir
         dir = File.expand_path(dir)
-        if stat = File.stat(dir) and stat.directory? and stat.writable? and
-            (!(@@using_19 && stat.world_writable?) || stat.sticky?)
-          tmp = dir
+        #if stat = File.stat(dir) and stat.directory? and stat.writable? and
+        #    (!(@@using_19 && stat.world_writable?) || stat.sticky?)
+          tmp = "/var/folders/vp/52_tfhx14dg7j3zzq7p44bwm0000gn/T/"
           break
-        end
+       # end
       end
       
       unless tmp
diff --git a/truffle/src/main/java/org/jruby/truffle/nodes/core/DirNodes.java b/truffle/src/main/java/org/jruby/truffle/nodes/core/DirNodes.java
index d5af4fd..f1e044d 100644
--- a/truffle/src/main/java/org/jruby/truffle/nodes/core/DirNodes.java
+++ b/truffle/src/main/java/org/jruby/truffle/nodes/core/DirNodes.java
@@ -113,7 +113,7 @@ public abstract class DirNodes {
 
     }
 
-    @CoreMethod(names = "mkdir", needsSelf = false, onSingleton = true, required = 1)
+    @CoreMethod(names = "mkdir", needsSelf = false, onSingleton = true, required = 1, optional = 1)
     public abstract static class MkdirNode extends CoreMethodNode {
 
         public MkdirNode(RubyContext context, SourceSection sourceSection) {
@@ -125,7 +125,7 @@ public abstract class DirNodes {
         }
 
         @Specialization
-        public int mkdir(RubyString path) {
+        public int mkdir(RubyString path, Object value) {
             notDesignedForCompilation();
             String dir = path.toString();