update

node_modules/@babel/plugin-transform-shorthand-properties/lib/index.js

@@ -23,15 +23,34 @@ var _default = (0, _helperPluginUtils.declare)(api => {
           const func = _core.types.functionExpression(null, node.params, node.body, node.generator, node.async);
 
           func.returnType = node.returnType;
-          path.replaceWith(_core.types.objectProperty(node.key, func, node.computed));
+
+          const computedKey = _core.types.toComputedKey(node);
+
+          if (_core.types.isStringLiteral(computedKey, {
+            value: "__proto__"
+          })) {
+            path.replaceWith(_core.types.objectProperty(computedKey, func, true));
+          } else {
+            path.replaceWith(_core.types.objectProperty(node.key, func, node.computed));
+          }
         }
       },
 
-      ObjectProperty({
-        node
-      }) {
+      ObjectProperty(path) {
+        const {
+          node
+        } = path;
+
         if (node.shorthand) {
-          node.shorthand = false;
+          const computedKey = _core.types.toComputedKey(node);
+
+          if (_core.types.isStringLiteral(computedKey, {
+            value: "__proto__"
+          })) {
+            path.replaceWith(_core.types.objectProperty(computedKey, node.value, true));
+          } else {
+            node.shorthand = false;
+          }
         }
       }