Also don't copy Lazy to Setter.

odersky · odersky · commit 48e515f405b3 · 2019-04-11T17:06:56.000+02:00
diff --git a/compiler/src/dotty/tools/dotc/ast/Desugar.scala b/compiler/src/dotty/tools/dotc/ast/Desugar.scala
@@ -158,7 +158,7 @@ object desugar {
         vparamss = (setterParam :: Nil) :: Nil,
         tpt      = TypeTree(defn.UnitType),
         rhs      = setterRhs
-      ).withMods((mods | Accessor) &~ (CaseAccessor | Implicit | Given))
+      ).withMods((mods | Accessor) &~ (CaseAccessor | Implicit | Given | Lazy))
       Thicket(vdef, setter)
     }
     else vdef

Original file line number	Diff line number	Diff line change
`@@ -158,7 +158,7 @@ object desugar {`
`158`	`158`	`vparamss = (setterParam :: Nil) :: Nil,`
`159`	`159`	`tpt = TypeTree(defn.UnitType),`
`160`	`160`	`rhs = setterRhs`
`161`		`- ).withMods((mods \| Accessor) &~ (CaseAccessor \| Implicit \| Given))`
	`161`	`+ ).withMods((mods \| Accessor) &~ (CaseAccessor \| Implicit \| Given \| Lazy))`
`162`	`162`	`Thicket(vdef, setter)`
`163`	`163`	`}`
`164`	`164`	`else vdef`