Adjust info if paramss during overloading

Author: som-snytt

compiler/src/dotty/tools/dotc/core/SymDenotations.scala

@@ -350,6 +350,7 @@ object SymDenotations {
 
       ensureCompleted()
       if rawParamss.isEmpty then recurWithoutParamss(info)
+      else if symbol.hasAnnotation(defn.MappedAlternativeAnnot) then recurWithParamss(info.stripPoly, rawParamss)
       else recurWithParamss(info, rawParamss)
     end paramSymss
 

tests/neg/i19077.scala

@@ -6,3 +6,8 @@ def f(@deprecatedName("x") x: Int, @deprecatedName y: Int, @deprecatedName("w")
   f(1, 2, 3, w = 42) // error
   f(1, 2, w = 42, z = 27) // error
   f(1, 2, z = 42, w = 27) // error
+
+object X { def m[T](i: Int)(s: String) = s*i; def m[T](i: Int)(d: Double) = d*i }
+
+object Y:
+  def f = X.m(42)(s = "") // overloading resolution objects to methRef.symbol.paramSymss