Fix test for poly functions

Author: liufengyun

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

@@ -257,9 +257,9 @@ class Semantic {
             Result(Hot, error :: Nil)
 
         case Fun(body, thisV, klass) =>
-          if meth.name == nme.apply then eval(body, thisV, klass, cacheResult = true)
-          else if meth.name.toString == "tupled" then Result(value, Nil)
-          else Result(Hot, Nil) // TODO: refine
+          // meth == NoSymbol for poly functions
+          if meth.name.toString == "tupled" then Result(value, Nil)
+          else eval(body, thisV, klass, cacheResult = true)
 
         case RefSet(refs) =>
           val resList = refs.map(_.call(meth, superType, source))

tests/init/neg/polyfun.scala

@@ -4,5 +4,5 @@ class Test {
       println(n)
       arg
     }
-  val n = m.apply(arg = 23)
+  val n = m.apply(arg = 23)   // error
 }