Add defaults to prevent exceptions

Author: wooorm

lib/util/track.js

@@ -8,13 +8,17 @@
  * This info isn’t used yet but suchs functionality allows line wrapping,
  * and theoretically source maps (though, is there practical use in that?).
  *
- * @param {TrackFields} options
+ * @param {TrackFields} options_
  */
-export function track(options) {
-  const now = options.now
-  let lineShift = options.lineShift
-  let line = now.line
-  let column = now.column
+export function track(options_) {
+  // Defaults are used to prevent crashes when older utilities somehow activate
+  // this code.
+  /* c8 ignore next 5 */
+  const options = options_ || {}
+  const now = options.now || {}
+  let lineShift = options.lineShift || 0
+  let line = now.line || 1
+  let column = now.column || 1
 
   return {move, current, shift}