fix: handle invalid JSON escape sequences in partial-json-parser

src/_vendor/partial-json-parser/parser.ts

@@ -249,7 +249,9 @@ const tokenize = (input: string): Token[] => {
     tokens.map((token) => {
       switch (token.type) {
         case 'string':
-          output += '"' + token.value + '"';
+          // Repair invalid JSON escape sequences (e.g. \H from PHP namespaces)
+          // by doubling backslashes before characters that are not valid JSON escapes
+          output += '"' + token.value.replace(/\\([^"\\\/bfnrtu])/g, '\\\\$1') + '"';
           break;
         default:
           output += token.value;

tests/lib/partial-json.test.ts

@@ -78,4 +78,16 @@ describe('partialParse', () => {
   test('deeply nested partial JSON objects', () => {
     expect(partialParse(`{"a": {"b": {"c": {"d": "e`)).toEqual({ a: { b: { c: {} } } });
   });
+
+  test('string with invalid JSON escape sequences (e.g. PHP namespaces)', () => {
+    expect(partialParse(`{"code": "use App\\Http\\Middleware"}`)).toEqual({
+      code: 'use App\\Http\\Middleware',
+    });
+  });
+
+  test('string with mixed valid and invalid escape sequences', () => {
+    expect(partialParse(`{"text": "line1\\nApp\\Http\\nline2"}`)).toEqual({
+      text: 'line1\nApp\\Http\nline2',
+    });
+  });
 });