--- a/editor/libeditor/TextEditRules.cpp
+++ b/editor/libeditor/TextEditRules.cpp
@@ -780,17 +780,17 @@ TextEditRules::WillInsertText(EditAction
       // in which case make the caret attach to the next line.
       bool endsWithLF =
         !outString->IsEmpty() && outString->Last() == nsCRT::LF;
       aSelection->SetInterlinePosition(endsWithLF);
 
       MOZ_ASSERT(!pointAfterStringInserted.GetChildAtOffset(),
         "After inserting text into a text node, pointAfterStringInserted."
         "GetChildAtOffset() should be nullptr");
-      ErrorResult error;
+      IgnoredErrorResult error;
       aSelection->Collapse(pointAfterStringInserted, error);
       if (error.Failed()) {
         NS_WARNING("Failed to collapse selection after inserting string");
       }
     }
   }
   ASSERT_PASSWORD_LENGTHS_EQUAL()
   return NS_OK;