Avoid EmptyScope.cloneScope crashing, eg on missing references (#16314)

scala · Nov 18, 2022 · e09175e · e09175e
2 parents 298ff3f + f8273c8
commit e09175e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/compiler/src/dotty/tools/dotc/core/Scopes.scala b/compiler/src/dotty/tools/dotc/core/Scopes.scala
@@ -467,7 +467,7 @@ object Scopes {
     override def size: Int = 0
     override def nestingLevel: Int = 0
     override def toList(using Context): List[Symbol] = Nil
-    override def cloneScope(using Context): MutableScope = unsupported("cloneScope")
+    override def cloneScope(using Context): MutableScope = newScope(nestingLevel)
     override def lookupEntry(name: Name)(using Context): ScopeEntry | Null = null
     override def lookupNextEntry(entry: ScopeEntry)(using Context): ScopeEntry | Null = null
   }