Add test for 2892

packages/babel-core/test/fixtures/transformation/misc/regression-2892/actual.js

@@ -0,0 +1,5 @@
+export default class Foo {
+  async bar() {
+    const baz = 0;
+  }
+}

packages/babel-core/test/fixtures/transformation/misc/regression-2892/expected.js

@@ -0,0 +1,19 @@
+export default class Foo {
+  bar() {
+    var _this = this;
+
+    return babelHelpers.asyncToGenerator(regeneratorRuntime.mark(function _callee() {
+      var baz;
+      return regeneratorRuntime.wrap(function _callee$(_context) {
+        while (1) switch (_context.prev = _context.next) {
+          case 0:
+            baz = 0;
+
+          case 1:
+          case "end":
+            return _context.stop();
+        }
+      }, _callee, _this);
+    }))();
+  }
+}

packages/babel-core/test/fixtures/transformation/misc/regression-2892/options.json

@@ -0,0 +1,3 @@
+ {
+  "plugins": ["external-helpers", "transform-async-to-generator", "transform-regenerator"]
+}