Check null-able variables before using them

rust-lang · Aug 23, 2018 · 1f441a0 · 1f441a0
1 parent 917cdd2
commit 1f441a0
Showing 1 changed file with 2 additions and 3 deletions.
diff --git a/src/librustdoc/html/static/main.js b/src/librustdoc/html/static/main.js
@@ -231,10 +231,9 @@
         }
 
         var elem = document.getElementById(hash);
-        if (elem && isHidden(elem.offsetParent)) {
+        if (elem && elem.offsetParent && isHidden(elem.offsetParent)) {
             var h3 = elem.parentNode.previousSibling;
-
-            if (h3.tagName !== 'H3') {
+            if (h3 && h3.tagName !== 'H3') {
                 h3 = h3.previousSibling; // skip div.docblock
             }