Merge pull request #260964 from dritter/fix-jetbrains-update-script

jetbrains: make update script robust against if no channels exist

pkgs/applications/editors/jetbrains/update_ides.py

@@ -31,6 +31,7 @@ def download_channels():
     return {
         channel["@name"]: channel
         for product in products
+        if "channel" in product
         for channel in one_or_more(product["channel"])
     }