fix #15910 (#15984)

* fix #15910

* produce op of op is nil

* Trigger build

tests/arc/t14383.nim

@@ -4,6 +4,21 @@ discard """
 hello
 hello
 @["a", "b"]
+---------------------
+plain:
+destroying: ('first', 42)
+destroying: ('second', 20)
+destroying: ('third', 12)
+
+Option[T]:
+destroying: ('first', 42)
+destroying: ('second', 20)
+destroying: ('third', 12)
+
+seq[T]:
+destroying: ('first', 42)
+destroying: ('second', 20)
+destroying: ('third', 12)
 '''
 """
 
@@ -47,4 +62,53 @@ proc freeJVMObject(o: JVMObject) =
 proc fromJObject(T: typedesc[JVMObject]): T =
   result.new(cast[proc(r: T) {.nimcall.}](freeJVMObject))
 
-discard JVMObject.fromJObject()
+discard JVMObject.fromJObject()
+
+
+#------------------------------------------------------------------------------
+# Issue #15910
+#------------------------------------------------------------------------------
+
+import options
+
+type
+  Thing = object
+    name: string
+    age: int
+
+proc `=destroy`(thing: var Thing) =
+  if thing.name != "":
+    echo "destroying: ('", thing.name, "', ", thing.age, ")"
+  `=destroy`(thing.name)
+  `=destroy`(thing.age)
+
+proc plain() =
+  var t = Thing(name: "first", age: 42)
+  t = Thing(name: "second", age: 20)
+  t = Thing()
+  let u = Thing(name: "third", age: 12)
+
+proc optionT() =
+  var t = Thing(name: "first", age: 42).some
+  t = Thing(name: "second", age: 20).some
+  t = none(Thing)
+  let u = Thing(name: "third", age: 12).some
+
+proc seqT() =
+  var t = @[Thing(name: "first", age: 42)]
+  t = @[Thing(name: "second", age: 20)]
+  t = @[]
+  let u = @[Thing(name: "third", age: 12)]
+
+echo "---------------------"
+echo "plain:"
+plain()
+echo()
+
+echo "Option[T]:"
+optionT()
+echo()
+
+echo "seq[T]:"
+seqT()
+echo()