Fix variable names

Author: eregon

src/main/java/org/truffleruby/core/kernel/TruffleKernelNodes.java

@@ -319,8 +319,8 @@ public static GetSpecialVariableStorage create() {
             return GetSpecialVariableStorageNodeGen.create();
         }
 
-        public void startSending(Reads variabless, Reads frame) {
-            if (variabless == Reads.CALLER || frame == Reads.CALLER) {
+        public void startSending(Reads variables, Reads frame) {
+            if (variables == Reads.CALLER || frame == Reads.CALLER) {
                 CompilerDirectives.shouldNotReachHere();
             }
             if (frame == Reads.SELF) {

src/main/java/org/truffleruby/language/FrameAndVariablesSendingNode.java

@@ -50,27 +50,27 @@
 @SuppressFBWarnings("IS")
 public abstract class FrameAndVariablesSendingNode extends RubyContextNode {
 
-    @Child protected FrameOrVariablesReadingNode sendingNode;
+    @Child protected FrameOrVariablesReadingNode readingNode;
 
     public boolean sendingFrames() {
-        if (sendingNode == null) {
+        if (readingNode == null) {
             return false;
         } else {
-            return sendingNode.sendingFrame();
+            return readingNode.sendingFrame();
         }
     }
 
-        if (sendingNode != null) {
-            sendingNode.startSending(variables, frame);
     private synchronized void startSending(Reads variables, Reads frame) {
+        if (readingNode != null) {
+            readingNode.startSending(variables, frame);
         } else if (variables == Reads.SELF && frame == Reads.NOTHING) {
-            sendingNode = insert(GetSpecialVariableStorage.create());
+            readingNode = insert(GetSpecialVariableStorage.create());
         } else if (variables == Reads.NOTHING && frame == Reads.SELF) {
-            sendingNode = insert(new ReadOwnFrameNode());
+            readingNode = insert(new ReadOwnFrameNode());
         } else if (variables == Reads.CALLER && frame == Reads.NOTHING) {
-            sendingNode = insert(new ReadCallerFrameNode());
+            readingNode = insert(new ReadCallerFrameNode());
         } else if (variables == Reads.NOTHING && frame == Reads.CALLER) {
-            sendingNode = insert(new ReadCallerVariablesNode());
+            readingNode = insert(new ReadCallerVariablesNode());
         }
     }
 
@@ -94,10 +94,10 @@ public void startSendingOwnVariables() {
     }
 
     public Object getFrameOrStorageIfRequired(Frame frame) {
-        if (sendingNode == null) {
+        if (readingNode == null) {
             return null;
         } else {
-            return sendingNode.execute(frame);
+            return readingNode.execute(frame);
         }
     }
 

src/main/java/org/truffleruby/language/FrameOrVariablesReadingNode.java

@@ -22,7 +22,7 @@ public static enum Reads {
 
     public Object execute(Frame frame);
 
-    public void startSending(Reads variabless, Reads frame);
+    public void startSending(Reads variables, Reads frame);
 
     public boolean sendingFrame();
 }