Fix BeanProperties positions

Author: dwijnand

compiler/src/dotty/tools/dotc/transform/BeanProperties.scala

@@ -39,7 +39,7 @@ class BeanProperties(thisPhase: DenotTransformer):
       }
       meth.addAnnotations(annots)
       val body: Tree = ref(valDef.symbol)
-      DefDef(meth, body)
+      DefDef(meth, body).withSpan(meth.span)
 
     def maybeGenerateSetter(valDef: ValDef, annot: Annotation)(using Context): Option[Tree] =
       Option.when(valDef.denot.asSymDenotation.flags.is(Mutable)) {
@@ -55,7 +55,7 @@ class BeanProperties(thisPhase: DenotTransformer):
           a.hasOneOfMetaAnnotation(defn.BeanSetterMetaAnnot) | !a.hasOneOfMetaAnnotation(defn.BeanGetterMetaAnnot)
         }
         meth.addAnnotations(annots)
-        DefDef(meth, (params: List[List[Tree]]) => Assign(ref(valDef.symbol), params.head.head))
+        DefDef(meth, (params: List[List[Tree]]) => Assign(ref(valDef.symbol), params.head.head)).withSpan(meth.span)
       }
 
     def prefixedName(prefix: String, valName: Name) =

compiler/src/dotty/tools/dotc/transform/Pickler.scala

@@ -1,4 +1,5 @@
-package dotty.tools.dotc
+package dotty.tools
+package dotc
 package transform
 
 import core._
@@ -147,6 +148,7 @@ class Pickler extends Phase {
     if unequal then
       output("before-pickling.txt", previous)
       output("after-pickling.txt", unpickled)
+      //sys.process.Process("diff -u before-pickling.txt after-pickling.txt").!
       report.error(em"""pickling difference for $cls in ${cls.source}, for details:
                     |
                     |  diff before-pickling.txt after-pickling.txt""")

compiler/src/dotty/tools/dotc/util/Spans.scala

@@ -182,6 +182,7 @@ object Spans {
       assert(isSpan)
       if (this == NoCoord) NoSpan else Span(-1 - encoding)
     }
+    override def toString = if isSpan then s"$toSpan" else s"Coord(idx=$toIndex)"
   }
 
   /** An index coordinate */