Add an assertion for sharing when setting array store and size.

Author: aardvark179

src/main/java/org/truffleruby/core/array/ArrayHelpers.java

@@ -12,10 +12,12 @@
 import org.truffleruby.RubyContext;
 import org.truffleruby.RubyLanguage;
 import org.truffleruby.core.array.library.ArrayStoreLibrary;
+import org.truffleruby.core.array.library.SharedArrayStorage;
 
 public abstract class ArrayHelpers {
 
     public static void setStoreAndSize(RubyArray array, Object store, int size) {
+        assert (store instanceof SharedArrayStorage) == (array.getShape().isShared());
         array.store = store;
         setSize(array, size);
     }