Remove unnecessary cacheResult=false, add test case.

Author: q-ata

compiler/src/dotty/tools/dotc/transform/init/Semantic.scala

@@ -893,7 +893,7 @@ object Semantic:
 
               case Cold => Cold
 
-              case ref: Ref => eval(vdef.rhs, ref, enclosingClass, cacheResult = true)
+              case ref: Ref => eval(vdef.rhs, ref, enclosingClass)
 
               case _ =>
                  report.error("[Internal error] unexpected this value when accessing local variable, sym = " + sym.show + ", thisValue = " + thisValue2.show + Trace.show, Trace.position)

tests/init/pos/recursion.scala

@@ -0,0 +1,9 @@
+class A {
+
+  val f: Int => Int = {
+    x => f(x)
+  }
+
+  f(5)
+
+}