Force less when computing the type of a module val

Fixes #11141

Author: odersky

compiler/src/dotty/tools/dotc/typer/Namer.scala

@@ -1328,8 +1328,9 @@ class Namer { typer: Typer =>
    */
   def moduleValSig(sym: Symbol)(using Context): Type = {
     val clsName = sym.name.moduleClassName
-    val cls = ctx.denotNamed(clsName).suchThat(_.is(ModuleClass))
-      .orElse(newStubSymbol(ctx.owner, clsName).assertingErrorsReported)
+    val cls = ctx.effectiveScope.lookupAll(clsName)
+      .find(_.is(ModuleClass))
+      .getOrElse(newStubSymbol(ctx.owner, clsName).assertingErrorsReported)
     ctx.owner.thisType.select(clsName, cls)
   }
 

tests/pos/i11141.scala

@@ -0,0 +1,5 @@
+package p
+export X._
+
+object X:
+  val A = 42