Some minor cleanup.

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/CExtNodes.java

@@ -847,8 +847,6 @@ public abstract static class GetNativeClassNode extends CExtBaseNode {
         @Child private PCallCapiFunction callGetObTypeNode;
         @Child private AsPythonObjectNode toJavaNode;
 
-        @CompilationFinal private TruffleObject func;
-
         public abstract PythonAbstractClass execute(PythonAbstractNativeObject object);
 
         @Specialization(guards = "cachedObject.equals(object)", limit = "1")
@@ -1361,7 +1359,7 @@ public static class PCallCapiFunction extends CExtBaseNode {
         private final String name;
         private final BranchProfile profile = BranchProfile.create();
 
-        @CompilationFinal TruffleObject receiver;
+        @CompilationFinal private TruffleObject receiver;
 
         public PCallCapiFunction(String name) {
             this.name = name;

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/PythonAbstractNativeObject.java

@@ -93,4 +93,10 @@ public boolean equals(Object obj) {
         PythonAbstractNativeObject other = (PythonAbstractNativeObject) obj;
         return Objects.equals(object, other.object);
     }
+
+    @Override
+    public String toString() {
+        CompilerAsserts.neverPartOfCompilation();
+        return String.format("PythonAbstractNativeObject(%s)", object);
+    }
 }