REPL crash when inspecting symbols of quoted.Type in staged code

[liufengyun]

minimized code

scala> import quoted._
scala> implicit def toolbox: scala.quoted.Toolbox = scala.quoted.Toolbox.make(getClass.getClassLoader)
scala> def fn[T : Type](v : T) = println("ok")
scala> object O
scala> withQuoteContext { withQuoteContext { given (qctx: QuoteContext) => import qctx.tasty._;  '[O.type].unseal.symbol.owner } }

Stack trace

java.lang.AssertionError: NoDenotation.owner
	at dotty.tools.dotc.core.SymDenotations$NoDenotation$.owner(SymDenotations.scala:2174)
	at dotty.tools.dotc.tastyreflect.ReflectionCompilerInterface.Symbol_owner(ReflectionCompilerInterface.scala:1511)
	at dotty.tools.dotc.tastyreflect.ReflectionCompilerInterface.Symbol_owner(ReflectionCompilerInterface.scala:1511)
	at scala.tasty.reflect.SymbolOps$SymbolAPI.owner(SymbolOps.scala:12)
	at rs$line$7$.$init$$$anonfun$1(rs$line$7:1)
	at scala.quoted.package$.dummyRun$1(package.scala:40)
	at scala.quoted.package$.withQuoteContext$$anonfun$1(package.scala:43)
	at dotty.tools.dotc.quoted.QuoteCompiler$QuotedFrontend.runOn$$anonfun$1(QuoteCompiler.scala:68)
	at scala.collection.immutable.List.flatMap(List.scala:338)
	at dotty.tools.dotc.quoted.QuoteCompiler$QuotedFrontend.runOn(QuoteCompiler.scala:82)
	at dotty.tools.dotc.Run.runPhases$4$$anonfun$4(Run.scala:158)
	at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:15)
	at dotty.runtime.function.JProcedure1.apply(JProcedure1.java:10)
	at scala.collection.IndexedSeqOptimized.foreach(IndexedSeqOptimized.scala:36)
	at scala.collection.IndexedSeqOptimized.foreach$(IndexedSeqOptimized.scala:33)
	at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:198)
	at dotty.tools.dotc.Run.runPhases$5(Run.scala:170)
	at dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:178)
	at dotty.runtime.function.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
	at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:65)
	at dotty.tools.dotc.Run.compileUnits(Run.scala:185)
	at dotty.tools.dotc.Run.compileUnits(Run.scala:125)
	at dotty.tools.dotc.quoted.QuoteCompiler$ExprRun.compileExpr(QuoteCompiler.scala:102)
	at dotty.tools.dotc.quoted.QuoteDriver.run(QuoteDriver.scala:36)
	at dotty.tools.dotc.quoted.ToolboxImpl$$anon$1.run(ToolboxImpl.scala:19)
	at scala.quoted.package$.withQuoteContext(package.scala:43)
	at rs$line$7$.<init>(rs$line$7:1)
	at rs$line$7$.<clinit>(rs$line$7)
	at rs$line$7.res1(rs$line$7)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at dotty.tools.repl.Rendering.$anonfun$3(Rendering.scala:57)
	at scala.Option.map(Option.scala:163)
	at dotty.tools.repl.Rendering.valueOf(Rendering.scala:57)
	at dotty.tools.repl.Rendering.renderVal(Rendering.scala:80)
	at dotty.tools.repl.ReplDriver.displayMembers$3$$anonfun$3(ReplDriver.scala:274)
	at scala.collection.TraversableLike.$anonfun$map$1(TraversableLike.scala:237)
	at scala.collection.mutable.ResizableArray.foreach(ResizableArray.scala:62)
	at scala.collection.mutable.ResizableArray.foreach$(ResizableArray.scala:55)
	at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:49)
	at scala.collection.TraversableLike.map(TraversableLike.scala:237)
	at scala.collection.TraversableLike.map$(TraversableLike.scala:230)
	at scala.collection.AbstractTraversable.map(Traversable.scala:108)
	at dotty.tools.repl.ReplDriver.displayMembers$7(ReplDriver.scala:274)
	at dotty.tools.repl.ReplDriver.displayDefinitions$$anonfun$3$$anonfun$2(ReplDriver.scala:300)
	at scala.Option.map(Option.scala:163)
	at dotty.tools.repl.ReplDriver.displayDefinitions$$anonfun$1(ReplDriver.scala:300)
	at dotty.tools.dotc.core.Phases.atPhase$$anonfun$1(Phases.scala:35)
	at dotty.tools.dotc.core.Periods.atPhase(Periods.scala:25)
	at dotty.tools.dotc.core.Phases.atPhase(Phases.scala:35)
	at dotty.tools.dotc.core.Contexts$Context.atPhase(Contexts.scala:71)
	at dotty.tools.repl.ReplDriver.displayDefinitions(ReplDriver.scala:306)
	at dotty.tools.repl.ReplDriver.compile$$anonfun$2(ReplDriver.scala:230)
	at scala.util.Either.fold(Either.scala:191)
	at dotty.tools.repl.ReplDriver.compile(ReplDriver.scala:230)
	at dotty.tools.repl.ReplDriver.interpret(ReplDriver.scala:182)
	at dotty.tools.repl.ReplDriver.loop$1(ReplDriver.scala:127)
	at dotty.tools.repl.ReplDriver.runUntilQuit$$anonfun$1(ReplDriver.scala:130)
	at dotty.tools.repl.ReplDriver.withRedirectedOutput$$anonfun$2$$anonfun$1(ReplDriver.scala:143)
	at scala.util.DynamicVariable.withValue(DynamicVariable.scala:62)
	at scala.Console$.withErr(Console.scala:196)
	at dotty.tools.repl.ReplDriver.withRedirectedOutput$$anonfun$1(ReplDriver.scala:143)
	at scala.util.DynamicVariable.withValue(DynamicVariable.scala:62)
	at scala.Console$.withOut(Console.scala:167)
	at dotty.tools.repl.ReplDriver.withRedirectedOutput(ReplDriver.scala:143)
	at dotty.tools.repl.ReplDriver.runUntilQuit(ReplDriver.scala:130)
	at dotty.tools.repl.Main$.main(Main.scala:6)
	at dotty.tools.repl.Main.main(Main.scala)

diagnosis

A possible cause is that the VirtualDirectory used for output in REPL is not available in classpath when running the code.

This is minimized and reproduced from the failure in #7012 .

We should re-enable the test disabled in cd9b3f8 once this issue is fixed.

[nicolasstucki]

Updated version

scala> import quoted._
scala> import quoted.staging._
scala> implicit def toolbox: Toolbox = Toolbox.make(getClass.getClassLoader)
def toolbox: quoted.staging.Toolbox
scala> def fn[T : Type](v : T) = println("ok")
def fn[T](v: T)(implicit evidence$1: quoted.Type[T]): Unit
scala> object O
// defined object O
scala> withQuoteContext { (given qctx: QuoteContext) => import qctx.tasty.{_, given};  '[O.type].unseal.symbol.owner }
//