From 8c03a53a0abc9d1f65252adbb2bb77aa0abf81d5 Mon Sep 17 00:00:00 2001
From: Tim Pillinger <26465611+wxtim@users.noreply.github.com>
Date: Mon, 16 Dec 2024 10:47:54 +0000
Subject: [PATCH] dict(was hiding stuff)

---
 cylc/flow/graph_parser.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/cylc/flow/graph_parser.py b/cylc/flow/graph_parser.py
index dad8c5aeff..12da7873ef 100644
--- a/cylc/flow/graph_parser.py
+++ b/cylc/flow/graph_parser.py
@@ -470,8 +470,7 @@ def parse_graph(self, graph_string: str) -> None:
                 pairs.add((chain[i], chain[i + 1]))
 
         # Get a set of RH nodes which are not at the LH of another pair:
-        pairs_dict = dict(pairs)
-        terminals = set(pairs_dict.values()).difference(pairs_dict.keys())
+        terminals = {p[1] for p in pairs}.difference({p[0] for p in pairs})
 
         for pair in pairs:
             self._proc_dep_pair(pair, terminals)