From b93570515d135f2804de5798aef9c81e94b330ed Mon Sep 17 00:00:00 2001
From: Matthew Nibecker <hello@mattnibecker.com>
Date: Wed, 12 Aug 2026 12:24:55 -0700
Subject: [PATCH] map call: rip fusion values

---
 runtime/vam/expr/mapcall.go       | 2 +-
 runtime/ztests/expr/map-func.yaml | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/runtime/vam/expr/mapcall.go b/runtime/vam/expr/mapcall.go
index c037305570..9075e74872 100644
--- a/runtime/vam/expr/mapcall.go
+++ b/runtime/vam/expr/mapcall.go
@@ -16,7 +16,7 @@ func NewMapCall(sctx *super.Context, e, lambda Evaluator) Evaluator {
 }
 
 func (m *mapCall) Eval(in vector.Any) vector.Any {
-	return vector.Apply(vector.ApplyRipUnions, m.eval, m.expr.Eval(in))
+	return vector.Apply(vector.ApplyRipUnions|vector.ApplyRipFusions, m.eval, m.expr.Eval(in))
 }
 
 func (m *mapCall) eval(vecs ...vector.Any) vector.Any {
diff --git a/runtime/ztests/expr/map-func.yaml b/runtime/ztests/expr/map-func.yaml
index e1295e50e3..5572606ca5 100644
--- a/runtime/ztests/expr/map-func.yaml
+++ b/runtime/ztests/expr/map-func.yaml
@@ -5,6 +5,7 @@ input: |
   set["foo","bar",null]
   "invalid"
   ["foo","bar"]::([string]|int64)
+  fusion(["foo","bar",null]::(string|[string|null]),<[string|null]>)
   null
 
 output: |
@@ -12,6 +13,7 @@ output: |
   set[null,"BAR","FOO"]
   error({message:"map: expected array or set value",on:"invalid"})
   ["FOO","BAR"]
+  ["FOO","BAR",null]
   null
   
 ---