fix: goldstein: keyword: broken-string: infinite loop

packages/goldstein/index.spec.js

@@ -259,6 +259,7 @@ test('goldstein: parse: if let', (t) => {
     const expected = montag`
         {
             let a = b?.c;
+            
             if (a) {
                 log(a);
             }

packages/keyword-broken-string/fixture/infinite.gs

@@ -0,0 +1 @@
+const a = 'b

packages/keyword-broken-string/fixture/infinite.js

@@ -0,0 +1 @@
+const a = '';

packages/keyword-broken-string/index.js

@@ -17,6 +17,9 @@ export default function keywordBrokenString(Parser) {
             for (;;) {
                 const ch = this.input.charCodeAt(this.pos);
 
+                if (!ch)
+                    break;
+
                 if (ch === quote)
                     break;
 

packages/keyword-broken-string/index.spec.js

@@ -12,3 +12,8 @@ test('goldstein: broken-string: no-semi', (t) => {
     t.compile('no-semi');
     t.end();
 });
+
+test('goldstein: broken-string: infinite', (t) => {
+    t.compile('infinite');
+    t.end();
+});

packages/keyword-if/fixture/if-let.js

@@ -1,6 +1,7 @@
 let a = 5;
 {
     let x = john.info?.name;
+
     if (x) {
         print(x);
     }