update template literal parsing to properly handle newlines

src/acorn/src/expression.js

@@ -513,7 +513,7 @@ pp.parseNew = function() {
 pp.parseTemplateElement = function() {
   let elem = this.startNode()
   elem.value = {
-    raw: this.input.slice(this.start, this.end),
+    raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, '\n'),
     cooked: this.value
   }
   this.next()

src/acorn/src/tokenize.js

@@ -577,11 +577,15 @@ pp.readTmplToken = function() {
     } else if (isNewLine(ch)) {
       out += this.input.slice(chunkStart, this.pos)
       ++this.pos
-      if (ch === 13 && this.input.charCodeAt(this.pos) === 10) {
-        ++this.pos
-        out += "\n"
-      } else {
-        out += String.fromCharCode(ch)
+      switch (ch) {
+        case 13:
+          if (this.input.charCodeAt(this.pos) === 10) ++this.pos;
+        case 10:
+          out += "\n";
+          break;
+        default:
+          out += String.fromCharCode(ch);
+          break;
       }
       if (this.options.locations) {
         ++this.curLine

test/acorn/tests-harmony.js

@@ -813,7 +813,7 @@ test("`\\n\\r\\b\\v\\t\\f\\\n\\\r\n`", {
       type: "TemplateLiteral",
       quasis: [{
         type: "TemplateElement",
-        value: {raw: "\\n\\r\\b\\v\\t\\f\\\n\\\r\n", cooked: "\n\r\b\u000b\t\f"},
+        value: {raw: "\\n\\r\\b\\v\\t\\f\\\n\\\n", cooked: "\n\r\b\u000b\t\f"},
         tail: true,
         loc: {
           start: {line: 1, column: 1},
@@ -841,7 +841,7 @@ test("`\\n\\r\\b\\v\\t\\f\\\n\\\r\n`", {
   locations: true
 });
 
-test("`\n\r\n`", {
+test("`\n\r\n\r`", {
   type: "Program",
   body: [{
     type: "ExpressionStatement",
@@ -849,27 +849,27 @@ test("`\n\r\n`", {
       type: "TemplateLiteral",
       quasis: [{
         type: "TemplateElement",
-        value: {raw: "\n\r\n", cooked: "\n\n"},
+        value: {raw: "\n\n\n", cooked: "\n\n\n"},
         tail: true,
         loc: {
           start: {line: 1, column: 1},
-          end: {line: 3, column: 0}
+          end: {line: 4, column: 0}
         }
       }],
       expressions: [],
       loc: {
         start: {line: 1, column: 0},
-        end: {line: 3, column: 1}
+        end: {line: 4, column: 1}
       }
     },
     loc: {
       start: {line: 1, column: 0},
-      end: {line: 3, column: 1}
+      end: {line: 4, column: 1}
     }
   }],
   loc: {
     start: {line: 1, column: 0},
-    end: {line: 3, column: 1}
+    end: {line: 4, column: 1}
   }
 }, {
   ecmaVersion: 6,
@@ -14134,8 +14134,6 @@ test('function normal(x, y = 10) {}', {
   }]
 }, {ecmaVersion: 6});
 
-test("'use strict'; function f([x,,z]) {}", {}, {ecmaVersion: 6});
-
 // test preserveParens option with arrow functions
 test("() => 42", {
   type: "Program",