Compile classes when spread is unsupported (#13075)

packages/babel-compat-data/scripts/data/plugin-features.js

@@ -72,7 +72,14 @@ const es2015 = {
     ],
   },
   "transform-spread": {
-    features: ["spread syntax for iterable objects"],
+    features: [
+      "spread syntax for iterable objects",
+      // We need to compile classes when spread is not supported, because
+      // we cannot compile super(...args) without also rewriting the
+      // "super" handling. There is a bugfix that makes it better.
+      "class",
+      "super",
+    ],
   },
   "transform-destructuring": {
     features: ["destructuring, assignment", "destructuring, declarations"],

packages/babel-compat-data/scripts/utils-build-data.js

@@ -88,7 +88,10 @@ exports.getLowestImplementedVersion = (
 };
 
 exports.generateData = (environments, features) => {
-  return Object.values(features).map(options => {
+  const data = {};
+
+  // eslint-disable-next-line prefer-const
+  for (let [key, options] of Object.entries(features)) {
     if (!options.features) {
       options = {
         features: [options],
@@ -103,8 +106,10 @@ exports.generateData = (environments, features) => {
     });
     addElectronSupportFromChromium(plugin);
 
-    return plugin;
-  });
+    data[key] = plugin;
+  }
+
+  return data;
 };
 
 exports.writeFile = function (data, dataPath, name) {