fix(parser): fixed escape keyword edgy cases

package.json

@@ -1,6 +1,6 @@
 {
   "name": "meriyah",
-  "version": "1.6.9",
+  "version": "1.6.10",
   "description": "A 100% compliant, self-hosted javascript parser with high focus on both performance and stability",
   "main": "dist/meriyah.umd.js",
   "module": "dist/meriyah.esm.js",

src/meriyah.ts

@@ -26,4 +26,4 @@ export function parse(source: string, options?: Options): ESTree.Program {
 export { Options, ESTree };
 
 // Export current version
-export const version = '1.6.9';
+export const version = '1.6.10';

src/parser.ts

@@ -5753,7 +5753,7 @@ export function parseObjectLiteralOrPattern(
       let state = PropertyKind.None;
       let key: ESTree.Expression | null = null;
       let value;
-
+      let t = parser.token;
       if (parser.token & (Token.IsIdentifier | Token.Keyword) || parser.token === Token.EscapedReserved) {
         key = parseIdentifier(parser, context, 0);
 
@@ -5808,6 +5808,8 @@ export function parseObjectLiteralOrPattern(
           if (parser.token & Token.IsIdentifier) {
             const tokenAfterColon = parser.token;
             const valueAfterColon = parser.tokenValue;
+            // A reserved word is an IdentifierName that cannot be used as an Identifier
+            destructible |= t === Token.EscapedReserved ? DestructuringKind.CannotDestruct : 0;
 
             value = parsePrimaryExpressionExtended(parser, context, kind, 0, 1, 0, inGroup, tokenPos, linePos, colPos);
 

test/parser/miscellaneous/escaped-keyword.ts

@@ -63,6 +63,7 @@ describe('Miscellaneous - Escaped keywords', () => {
     'var prot\\u0065cted = 1;',
     'var { prot\\u0065cted  } = {};',
     '(publ\\u0069c);',
+    'var C = class { get "def\\u{61}ult"() { return "get string"; } set "def\\u{61}ult"(param) { stringSet = param; } };',
     'var publ\\u0069c = 1;',
     'var { publ\\u0069c } = {};',
     '(st\\u0061tic);',
@@ -73,11 +74,6 @@ describe('Miscellaneous - Escaped keywords', () => {
     'class aw\\u0061it {}',
     'aw\\u0061it: 1;',
     'function *a(){({yi\\u0065ld: 0})}',
-    'var y = { bre\\u0061k: x } = { break: 42 };',
-    'var y = { c\\u0061se: x } = { case: 42 };',
-    'var y = { c\\u0061tch: x } = { catch: 42 };',
-    'var y = { \\u0063onst: x } = { const: 42 };',
-    'var y = { \\u0064ebugger: x } = { debugger: 42 };',
     '\\u0061sync',
     'l\\u0065t\na',
     'l\\u0065t',
@@ -113,6 +109,12 @@ describe('Miscellaneous - Escaped keywords', () => {
     ['var x = tr\\u0075e;', Context.None],
     ['var tr\\u0075e = 1;', Context.None],
     ['({ def\\u0061ult })', Context.None],
+    ['0, { def\\u{61}ult: x } = { default: 42 };', Context.None],
+    ['var y = { bre\\u0061k: x } = { break: 42 };', Context.None],
+    ['var y = { c\\u0061se: x } = { case: 42 };', Context.None],
+    ['var y = { c\\u0061tch: x } = { catch: 42 };', Context.None],
+    ['var y = { \\u0063onst: x } = { const: 42 };', Context.None],
+    ['var y = { \\u0064ebugger: x } = { debugger: 42 };', Context.None],
     ['var { tr\\u0075e } = {};', Context.None],
     ['tr\\u0075e = 1;', Context.None],
     ['(x === f\\u0061lse);', Context.None],
@@ -220,6 +222,14 @@ describe('Miscellaneous - Escaped keywords', () => {
     ['if (this \\u0069nstanceof Array) {}', Context.None],
     ['(n\\u0065w function f() {})', Context.None],
     ['(typ\\u0065of 123)', Context.None],
+    ['var y = { c\\u0061se: x } = { case: 42 };', Context.None],
+    ['({ def\\u{61}ult }) => 42;', Context.None],
+    ['0, { def\\u{61}ult } = { default: 42 };', Context.None],
+    ['var x = ({ bre\\u0061k }) => {};', Context.None],
+    ['var x = ({ tr\\u0079 }) => {};', Context.None],
+    ['var x = ({ typ\\u0065of }) => {};', Context.None],
+    ['def\\u0061ult', Context.None],
+    ['var x = { \\u0069mport } = { import: 42 };', Context.Strict | Context.Module],
     ['(v\\u006fid 0)', Context.None],
     ['aw\\u0061it: 1;', Context.Module | Context.Strict],
     ['var \\u{65}\\u{6e}\\u{75}\\u{6d} = 123;', Context.None],
@@ -230,6 +240,7 @@ describe('Miscellaneous - Escaped keywords', () => {
     ['var \\u0062\\u0072\\u0065\\u0061\\u006b = 123;;', Context.None],
     ['var \\u{63}ase = 123;', Context.None],
     ['var \\u{63}atch = 123;', Context.None],
+    ['var x = { \\u0066unction } = { function: 42 };', Context.None],
     ['var \\u{63}ontinue = 123;', Context.None],
     ['var fina\\u{6c}ly = 123;', Context.None],
     ['var \\u{64}\\u{6f} = 123;', Context.None],