Always ensure symcache mkt pair entry is valid type

pikers · Sep 19, 2023 · 05959ea · 05959ea
1 parent 30d55fd
commit 05959ea
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/piker/accounting/_pos.py b/piker/accounting/_pos.py
@@ -543,6 +543,11 @@ def update_from_ledger(
 
             if not (pos := pps.get(bs_mktid)):
 
+                assert isinstance(
+                    mkt,
+                    MktPair,
+                )
+
                 # if no existing pos, allocate fresh one.
                 pos = pps[bs_mktid] = Position(
                     mkt=mkt,