Fix input causing misc. crashes before 100% loaded

Definitely by pressing Ctrl-L but probably any of these would cause all
sorts of badness.

1 files changed, 6 insertions, 0 deletions

diff --git a/ui.js b/ui.js
index 049930b..e29fb2c 100644
--- a/ui.js
+++ b/ui.js
@@ -1153,6 +1153,12 @@ class GrouplikeListingElement extends Form {
   }
 
   keyPressed(keyBuf) {
+    // Just about everything here depends on the grouplike existing, so let's
+    // not continue if it doesn't!
+    if (!this.grouplike) {
+      return
+    }
+
     if (telc.isBackspace(keyBuf)) {
       this.loadParentGrouplike()
     } else if (telc.isCharacter(keyBuf, '/') || keyBuf[0] === 6) { // '/', ctrl-F