fix: loop protect breaking when no LOC

lib/index.js

@@ -38,6 +38,13 @@ const generateInside = ({ t, id, line, ch, timeout, extra } = {}) => {
 };
 
 const protect = (t, timeout, extra) => path => {
+  if (!path.node.loc) {
+    // I don't really know _how_ we get into this state
+    // but https://jsbin.com/mipesawapi/1/ triggers it
+    // and the node, I'm guessing after translation,
+    // doesn't have a line in the code, so this blows up.
+    return;
+  }
   const id = path.scope.generateUidIdentifier('LP');
   const before = generateBefore(t, id);
   const inside = generateInside({

package.json

@@ -3,7 +3,7 @@
   "name": "loop-protect",
   "description": "Prevent infinite loops in dynamically eval'd JavaScript.",
   "main": "dist/",
-  "version": "2.1.5",
+  "version": "2.1.6",
   "homepage": "https://github.com/jsbin/loop-protect",
   "repository": {
     "type": "git",