Expression ['', 'field_runfiles']: ensure disjointness

... by using "disjoint_map_union" instead of "map_union" which
has a latest-wins semantics and does not have a "msg" arguement.

1 files changed, 1 insertions, 1 deletions

diff --git a/EXPRESSIONS b/EXPRESSIONS
index 1c2ff84..f40e5a3 100644
--- a/EXPRESSIONS
+++ b/EXPRESSIONS
@@ -59,7 +59,7 @@
     }
   , "imports": {"runfiles_list": "field_runfiles_list"}
   , "expression":
-    { "type": "map_union"
+    { "type": "disjoint_map_union"
     , "msg": "runfiles must not overlap"
     , "$1": {"type": "CALL_EXPRESSION", "name": "runfiles_list"}
     }