Assert that Match are not created without any CaseDef

Author: tOverney

compiler/src/dotty/tools/dotc/ast/Trees.scala

@@ -520,6 +520,7 @@ object Trees {
   /** selector match { cases } */
   case class Match[-T >: Untyped] private[ast] (selector: Tree[T], cases: List[CaseDef[T]])
     extends TermTree[T] {
+    assert(cases.nonEmpty)
     type ThisTree[-T >: Untyped] = Match[T]
     def isInline = false
   }

tests/run/literals.decompiled

@@ -1,4 +1,4 @@
-/** Decompiled from out/runTestFromTasty/run/literals/Test.tasty */
+/** Decompiled from out/runTestFromTasty/run/literals/Test.class */
 object Test {
   def αρετη: java.lang.String = "alpha rho epsilon tau eta"
   case class GGG(i: scala.Int) {
@@ -95,4 +95,4 @@ object Test {
     val ggg: scala.Int = Test.GGG.apply(1).αα(Test.GGG.apply(2))
     Test.check_success[scala.Int]("ggg == 3", ggg, 3)
   }
-}
+}