Do not attempt to write a regular member when the writing of a hash entry succeeded.

Author: iamstolis

graal-js/src/com.oracle.truffle.js/src/com/oracle/truffle/js/nodes/access/PropertySetNode.java

@@ -1097,6 +1097,7 @@ private boolean performWriteMember(Object truffleObject, Object value, PropertyS
             if (context.getContextOptions().hasForeignHashProperties() && interop.hasHashEntries(truffleObject)) {
                 try {
                     interop.writeHashEntry(truffleObject, stringKey, value);
+                    return true;
                 } catch (UnknownKeyException | UnsupportedMessageException | UnsupportedTypeException e) {
                     if (root.isStrict) {
                         errorBranch.enter();

graal-js/src/com.oracle.truffle.js/src/com/oracle/truffle/js/nodes/access/WriteElementNode.java

@@ -1858,6 +1858,7 @@ protected void executeWithTargetAndIndexUnguarded(Object target, Object index, O
             if (root.context.getContextOptions().hasForeignHashProperties() && interop.hasHashEntries(truffleObject)) {
                 try {
                     interop.writeHashEntry(truffleObject, propertyKey, exportedValue);
+                    return;
                 } catch (UnknownKeyException | UnsupportedMessageException | UnsupportedTypeException e) {
                     if (root.isStrict) {
                         errorBranch.enter();