Synchronise quoted.Toolbox

Author: nicolasstucki

compiler/src/dotty/tools/dotc/quoted/Toolbox.scala

@@ -13,16 +13,18 @@ object Toolbox {
 
     private[this] val driver: QuoteDriver = new QuoteDriver()
 
-    def run[T](expr: Expr[T]): T = expr match {
-      case expr: LiftedExpr[T] =>
-        expr.value
-      case expr: TastyTreeExpr[Tree] @unchecked =>
-        throw new Exception("Cannot call `Expr.run` on an `Expr` that comes from an inline macro argument.")
-      case _ =>
-        driver.run(expr, settings)
+    def run[T](expr: Expr[T]): T = synchronized {
+      expr match {
+        case expr: LiftedExpr[T] =>
+          expr.value
+        case expr: TastyTreeExpr[Tree] @unchecked =>
+          throw new Exception("Cannot call `Expr.run` on an `Expr` that comes from an inline macro argument.")
+        case _ =>
+          driver.run(expr, settings)
+      }
     }
 
-    def show[T](expr: Expr[T]): String = driver.show(expr, settings)
+    def show[T](expr: Expr[T]): String = synchronized(driver.show(expr, settings))
 
   }
 }