Eliminating var-like setter tpe_= on Tree.

Deprecated tpe_= on Tree, which is redundant with and
less useful than setType. To provide a small layer of
insulation from the direct nulling out of mutable fields
used to signal the typer, added def clearType() which is
merely tree.tpe = null but is shamefaced about the null
and var-settings parts like a respectable method should be.

1 files changed, 1 insertions, 2 deletions

diff --git a/src/compiler/scala/tools/nsc/typechecker/Namers.scala b/src/compiler/scala/tools/nsc/typechecker/Namers.scala
index 9a32747c3a..d524c88f43 100644
--- a/src/compiler/scala/tools/nsc/typechecker/Namers.scala
+++ b/src/compiler/scala/tools/nsc/typechecker/Namers.scala
@@ -1361,8 +1361,7 @@ trait Namers extends MethodSynthesis {
             transformed(tree) = newImport
             // copy symbol and type attributes back into old expression
             // so that the structure builder will find it.
-            expr.symbol = expr1.symbol
-            expr.tpe = expr1.tpe
+            expr setSymbol expr1.symbol setType expr1.tpe
             ImportType(expr1)
           }
       }