rnewson commented on code in PR #5424:
URL: https://github.com/apache/couchdb/pull/5424#discussion_r1945487893


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src/couch_quickjs/src/couch_quickjs_scanner_plugin.erl:
##########
@@ -814,12 +814,16 @@ nouveau_add_fun(#proc{}, _) ->
     ok.
 
 clouseau_index_doc(#proc{} = Proc, {[_ | _]} = Doc) ->
-    [Fields | _] = prompt(Proc, [<<"index_doc">>, Doc]),
-    lists:sort(Fields).
+    case prompt(Proc, [<<"index_doc">>, Doc]) of
+        [Fields | _] -> lists:sort(Fields);
+        [] -> []
+    end.
 
 nouveau_index_doc(#proc{} = Proc, {[_ | _]} = Doc) ->
-    [Fields | _] = prompt(Proc, [<<"nouveau_index_doc">>, Doc]),
-    lists:sort(Fields).
+    case prompt(Proc, [<<"nouveau_index_doc">>, Doc]) of
+        [Fields | _] -> lists:sort(Fields);
+        [] -> []
+    end.

Review Comment:
   is there a test that would fail if nouveau deviated from this?



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