LazyVals - do not rely on absence of name clashes in scope.

Was creating correct code, but was assuming that all objects with the same name share
same bits. No need to do it.

Author: DarkDimius

src/dotty/tools/dotc/transform/LazyVals.scala

@@ -38,7 +38,7 @@ class LazyVals extends MiniPhaseTransform with IdentityDenotTransformer {
   /** this map contains mutable state of transformation: OffsetDefs to be appended to companion object definitions,
     * and number of bits currently used */
   class OffsetInfo(var defs: List[Tree], var ord:Int)
-  val appendOffsetDefs = mutable.Map.empty[Name, OffsetInfo]
+  val appendOffsetDefs = mutable.Map.empty[Symbol, OffsetInfo]
 
   override def phaseName: String = "LazyVals"
 
@@ -64,7 +64,7 @@ class LazyVals extends MiniPhaseTransform with IdentityDenotTransformer {
     override def transformTypeDef(tree: TypeDef)(implicit ctx: Context, info: TransformerInfo): Tree = {
       if (!tree.symbol.isClass) tree
       else {
-        appendOffsetDefs.get(tree.symbol.name) match {
+        appendOffsetDefs.get(tree.symbol) match {
           case None => tree
           case Some(data) =>
             val template = tree.rhs.asInstanceOf[Template]
@@ -296,7 +296,7 @@ class LazyVals extends MiniPhaseTransform with IdentityDenotTransformer {
         var ord = 0
 
         // compute or create appropriate offsetSymol, bitmap and bits used by current ValDef
-        appendOffsetDefs.get(companion.name.moduleClassName) match {
+        appendOffsetDefs.get(companion.moduleClass) match {
           case Some(info) =>
             val flagsPerLong = 64 / RLazyVals.BITS_PER_LAZY_VAL
             info.ord += 1