Fix JS error

GuillaumeGomez · GuillaumeGomez · commit 827047c18b84 · 2018-09-24T22:05:12.000+02:00
diff --git a/src/librustdoc/html/static/main.js b/src/librustdoc/html/static/main.js
@@ -1991,8 +1991,11 @@
                 }
         };
         if (getCurrentValue('rustdoc-trait-implementations') !== "false") {
-            onEach(document.getElementById('implementations-list')
-                           .getElementsByClassName("collapse-toggle"), collapser);
+            var impl_list = document.getElementById('implementations-list');
+
+            if (impl_list !== null) {
+                onEach(impl_list.getElementsByClassName("collapse-toggle"), collapser);
+            }
         }
         if (getCurrentValue('rustdoc-method-docs') !== "false") {
             var implItems = document.getElementsByClassName('impl-items');

Original file line number	Diff line number	Diff line change
`@@ -1991,8 +1991,11 @@`
`1991`	`1991`	`}`
`1992`	`1992`	`};`
`1993`	`1993`	`if (getCurrentValue('rustdoc-trait-implementations') !== "false") {`
`1994`		`- onEach(document.getElementById('implementations-list')`
`1995`		`- .getElementsByClassName("collapse-toggle"), collapser);`
	`1994`	`+ var impl_list = document.getElementById('implementations-list');`
	`1995`	`+`
	`1996`	`+ if (impl_list !== null) {`
	`1997`	`+ onEach(impl_list.getElementsByClassName("collapse-toggle"), collapser);`
	`1998`	`+ }`
`1996`	`1999`	`}`
`1997`	`2000`	`if (getCurrentValue('rustdoc-method-docs') !== "false") {`
`1998`	`2001`	`var implItems = document.getElementsByClassName('impl-items');`