Handle isDefinedInCurrentRun on no symbol

Fixes scala#13095

Author: nicolasstucki

compiler/src/scala/quoted/runtime/impl/QuotesImpl.scala

@@ -2455,7 +2455,7 @@ class QuotesImpl private (using val ctx: Context) extends Quotes, QuoteUnpickler
           }
 
         def isDefinedInCurrentRun: Boolean =
-          self.topLevelClass.asClass.isDefinedInCurrentRun
+          self.exists && self.topLevelClass.asClass.isDefinedInCurrentRun
         def isLocalDummy: Boolean = self.denot.isLocalDummy
         def isRefinementClass: Boolean = self.denot.isRefinementClass
         def isAliasType: Boolean = self.denot.isAliasType

tests/pos-macros/i13095/Macro_1.scala

@@ -0,0 +1,9 @@
+
+import scala.quoted.*
+
+inline def testMacro = ${ test }
+
+def test(using Quotes): Expr[Unit] =
+  import quotes.reflect.*
+  assert(!Symbol.noSymbol.isDefinedInCurrentRun)
+  '{}

tests/pos-macros/i13095/Test_2.scala

@@ -0,0 +1 @@
+def unitTest = testMacro