LMF cannot run trait's "initializer" (constructor)

Thus, rule out traits that have a constructor (which we use
as a proxy for having potentially side-effecting statements),
and create an anonymous subclass for them at compile time.

2 files changed, 9 insertions, 1 deletions

diff --git a/test/files/run/sammy_restrictions_LMF.check b/test/files/run/sammy_restrictions_LMF.check
new file mode 100644
index 0000000000..6ed281c757
--- /dev/null
+++ b/test/files/run/sammy_restrictions_LMF.check
@@ -0,0 +1,2 @@
+1
+1
diff --git a/test/files/run/sammy_restrictions_LMF.scala b/test/files/run/sammy_restrictions_LMF.scala
index 40bb234a72..27a3d21dad 100644
--- a/test/files/run/sammy_restrictions_LMF.scala
+++ b/test/files/run/sammy_restrictions_LMF.scala
@@ -3,6 +3,11 @@ trait TInt extends T[Int]
 
 trait TWithVal { val x: Any = 1; def apply(x: Int): String }
 
+trait TImpure { def apply(x: Int): String ; println(1) }
+
+trait Println { println(1) }
+trait TImpureSuper extends Println { def apply(x: Int): String  }
+
 object Test extends App {
   final val AnonFunClass = "$anonfun$"
   final val LMFClass = "$$Lambda$" // LambdaMetaFactory names classes like this
@@ -38,5 +43,6 @@ object Test extends App {
   notLMF(fVal)
   assert(fVal.x == 1)
 
-
+  notLMF((x => "a"): TImpure)
+  notLMF((x => "a"): TImpureSuper)
 }