update Babel to 7.7.0 and enable error recovery

cspell.json

@@ -91,8 +91,8 @@
         "editorconfig",
         "ekkhus",
         "elektronik",
-        "ENOENT",
         "Eneman",
+        "ENOENT",
         "ericsakmar",
         "Ericsburgh",
         "Esben",
@@ -393,6 +393,7 @@
         "<!-- prettier-ignore -->\\n(`{3,})\\w*\\n[\\s\\S]+?\\1",
         "\\[@\\w+?\\]",
         "\\[`\\w+`\\]",
-        "ve+r+y+(long\\w+)?"
+        "ve{2,}r{2,}y",
+        "ve+r+y+long\\w*"
     ]
-}
+}

package.json

@@ -16,7 +16,7 @@
   "dependencies": {
     "@angular/compiler": "8.2.13",
     "@babel/code-frame": "7.5.5",
-    "@babel/parser": "7.6.4",
+    "@babel/parser": "7.7.0",
     "@glimmer/syntax": "0.41.0",
     "@iarna/toml": "2.2.3",
     "@typescript-eslint/typescript-estree": "2.6.0",
@@ -74,8 +74,8 @@
     "yaml-unist-parser": "1.1.1"
   },
   "devDependencies": {
-    "@babel/core": "7.6.3",
-    "@babel/preset-env": "7.6.3",
+    "@babel/core": "7.7.0",
+    "@babel/preset-env": "7.7.1",
     "@rollup/plugin-alias": "2.2.0",
     "@rollup/plugin-replace": "2.2.0",
     "babel-loader": "8.0.6",

src/language-js/clean.js

@@ -10,7 +10,8 @@ function clean(ast, newObj, parent) {
     "extra",
     "start",
     "end",
-    "flags"
+    "flags",
+    "errors"
   ].forEach(name => {
     delete newObj[name];
   });

src/language-js/parser-babylon.js

@@ -17,6 +17,7 @@ function babelOptions(extraOptions, extraPlugins) {
       allowReturnOutsideFunction: true,
       allowSuperOutsideMethod: true,
       allowUndeclaredExports: true,
+      errorRecovery: true,
       plugins: [
         "jsx",
         "doExpressions",

src/language-js/printer-estree-json.js

@@ -64,6 +64,7 @@ function clean(node, newNode /*, parent*/) {
   delete newNode.extra;
   delete newNode.loc;
   delete newNode.comments;
+  delete newNode.errors;
 
   if (node.type === "Identifier") {
     return { type: "StringLiteral", value: node.name };

tests/js_invalid_code/__snapshots__/jsfmt.spec.js.snap

@@ -0,0 +1,16 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`duplicate_bindings.js 1`] = `
+====================================options=====================================
+parsers: ["babel"]
+printWidth: 80
+                                                                                | printWidth
+=====================================input======================================
+class A{}   class A{}
+
+=====================================output=====================================
+class A {}
+class A {}
+
+================================================================================
+`;

tests/js_invalid_code/duplicate_bindings.js

@@ -0,0 +1 @@
+class A{}   class A{}

tests/js_invalid_code/jsfmt.spec.js

@@ -0,0 +1 @@
+run_spec(__dirname, ["babel"]);