fix: catch JSON.parse error for renovate config

lib/workers/repository/init/config.js

@@ -89,7 +89,16 @@ async function mergeRenovateConfig(config) {
       error.validationMessage = JSON.stringify(jsonValidationError);
       throw error;
     }
-    renovateJson = JSON.parse(renovateConfig);
+    try {
+      renovateJson = JSON.parse(renovateConfig);
+    } catch (err) /* istanbul ignore next */ {
+      logger.debug({ renovateConfig }, 'Error parsing renovate config');
+      const error = new Error('config-validation');
+      error.configFile = configFile;
+      error.validationError = 'Invalid JSON (parsing failed)';
+      error.validationMessage = 'JSON.parse error: ' + err.message;
+      throw error;
+    }
     logger.info({ config: renovateJson }, 'renovate.json config');
   }
   const migratedConfig = await migrateAndValidate(config, renovateJson);