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PawkyPenguin opened this issue Oct 9, 2023 · 2 comments
Open

Compiler crash using F-bounded polymorphism and typeclass derivation #18670

PawkyPenguin opened this issue Oct 9, 2023 · 2 comments
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area:typeclass-derivation itype:bug itype:crash

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@PawkyPenguin
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Compiler version

3.3.1

Minimized code

import upickle.default.ReadWriter

abstract class Payload[A <: Payload[A]: ReadWriter]() {
  def pickle = upickle.default.write(this.asInstanceOf[A])
}

case class Summary() extends Payload()

The code is deceptively small, but unfortunately it uses lihaoyi's upickle and I could not minimize it out. So far I was not able to reproduce the error by simply writing my own typeclass trait ReadWriter[A] and I don't know enough about mirrors to look into and understand what is happening in the upickle source code. Sorry!

sbt build

ThisBuild / scalaVersion := "3.3.1"

lazy val root = project.in(file(".")).settings(
  libraryDependencies ++= Seq( "com.lihaoyi" %% "upickle" % "3.1.0")
)

Output (click arrow to expand)

[error] java.lang.Error: internal error: type of Mirror.*Of argument T is not fully defined, pos = compilerBug.scala:7
[error] dotty.tools.dotc.typer.Inferencing$.fullyDefinedType(Inferencing.scala:46)
[error] dotty.tools.dotc.typer.Synthesizer.makeMirror(Synthesizer.scala:575)
[error] dotty.tools.dotc.typer.Synthesizer.$init$$$anonfun$6$$anonfun$1(Synthesizer.scala:585)
[error] dotty.tools.dotc.typer.Synthesizer.recur$1(Synthesizer.scala:738)
[error] dotty.tools.dotc.typer.Synthesizer.recur$1$$anonfun$1(Synthesizer.scala:740)
[error] dotty.tools.dotc.typer.Synthesizer$.dotty$tools$dotc$typer$Synthesizer$$$orElse(Synthesizer.scala:759)
[error] dotty.tools.dotc.typer.Synthesizer.recur$1(Synthesizer.scala:740)
[error] dotty.tools.dotc.typer.Synthesizer.recur$1$$anonfun$1(Synthesizer.scala:740)
[error] dotty.tools.dotc.typer.Synthesizer$.dotty$tools$dotc$typer$Synthesizer$$$orElse(Synthesizer.scala:759)
[error] dotty.tools.dotc.typer.Synthesizer.recur$1(Synthesizer.scala:740)
[error] dotty.tools.dotc.typer.Synthesizer.recur$1$$anonfun$1(Synthesizer.scala:740)
[error] dotty.tools.dotc.typer.Synthesizer$.dotty$tools$dotc$typer$Synthesizer$$$orElse(Synthesizer.scala:759)
[error] dotty.tools.dotc.typer.Synthesizer.recur$1(Synthesizer.scala:740)
[error] dotty.tools.dotc.typer.Synthesizer.recur$1$$anonfun$1(Synthesizer.scala:740)
[error] dotty.tools.dotc.typer.Synthesizer$.dotty$tools$dotc$typer$Synthesizer$$$orElse(Synthesizer.scala:759)
[error] dotty.tools.dotc.typer.Synthesizer.recur$1(Synthesizer.scala:740)
[error] dotty.tools.dotc.typer.Synthesizer.recur$1$$anonfun$1(Synthesizer.scala:740)
[error] dotty.tools.dotc.typer.Synthesizer$.dotty$tools$dotc$typer$Synthesizer$$$orElse(Synthesizer.scala:759)
[error] dotty.tools.dotc.typer.Synthesizer.recur$1(Synthesizer.scala:740)
[error] dotty.tools.dotc.typer.Synthesizer.tryAll(Synthesizer.scala:743)
[error] dotty.tools.dotc.typer.Implicits.inferImplicitArg(Implicits.scala:890)
[error] dotty.tools.dotc.typer.Implicits.inferImplicitArg$(Implicits.scala:818)
[error] dotty.tools.dotc.typer.Typer.inferImplicitArg(Typer.scala:116)
[error] dotty.tools.dotc.typer.Typer.implicitArgs$1(Typer.scala:3737)
[error] dotty.tools.dotc.typer.Typer.addImplicitArgs$1(Typer.scala:3773)
[error] dotty.tools.dotc.typer.Typer.adaptNoArgsImplicitMethod$1(Typer.scala:3849)
[error] dotty.tools.dotc.typer.Typer.adaptNoArgs$1(Typer.scala:4038)
[error] dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:4268)
[error] dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3587)
[error] dotty.tools.dotc.typer.Typer.readapt$1(Typer.scala:3598)
[error] dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:4255)
[error] dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3587)
[error] dotty.tools.dotc.typer.Implicits.typedImplicit(Implicits.scala:1117)
[error] dotty.tools.dotc.typer.Implicits.typedImplicit$(Implicits.scala:818)
[error] dotty.tools.dotc.typer.Typer.typedImplicit(Typer.scala:116)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.tryImplicit(Implicits.scala:1242)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.rank$1(Implicits.scala:1341)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1511)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1539)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1547)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.bestImplicit(Implicits.scala:1572)
[error] dotty.tools.dotc.typer.Implicits.inferImplicit(Implicits.scala:1060)
[error] dotty.tools.dotc.typer.Implicits.inferImplicit$(Implicits.scala:818)
[error] dotty.tools.dotc.typer.Typer.inferImplicit(Typer.scala:116)
[error] dotty.tools.dotc.typer.Implicits.inferImplicitArg(Implicits.scala:884)
[error] dotty.tools.dotc.typer.Implicits.inferImplicitArg$(Implicits.scala:818)
[error] dotty.tools.dotc.typer.Typer.inferImplicitArg(Typer.scala:116)
[error] dotty.tools.dotc.typer.Typer.implicitArgs$1(Typer.scala:3737)
[error] dotty.tools.dotc.typer.Typer.addImplicitArgs$1(Typer.scala:3773)
[error] dotty.tools.dotc.typer.Typer.adaptNoArgsImplicitMethod$1(Typer.scala:3849)
[error] dotty.tools.dotc.typer.Typer.adaptNoArgs$1(Typer.scala:4038)
[error] dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:4268)
[error] dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3587)
[error] dotty.tools.dotc.typer.Typer.readapt$1(Typer.scala:3598)
[error] dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:4255)
[error] dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3587)
[error] dotty.tools.dotc.typer.Implicits.typedImplicit(Implicits.scala:1117)
[error] dotty.tools.dotc.typer.Implicits.typedImplicit$(Implicits.scala:818)
[error] dotty.tools.dotc.typer.Typer.typedImplicit(Typer.scala:116)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.tryImplicit(Implicits.scala:1242)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.rank$1(Implicits.scala:1341)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1511)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1539)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1547)
[error] dotty.tools.dotc.typer.Implicits$ImplicitSearch.bestImplicit(Implicits.scala:1572)
[error] dotty.tools.dotc.typer.Implicits.inferImplicit(Implicits.scala:1060)
[error] dotty.tools.dotc.typer.Implicits.inferImplicit$(Implicits.scala:818)
[error] dotty.tools.dotc.typer.Typer.inferImplicit(Typer.scala:116)
[error] dotty.tools.dotc.typer.Implicits.inferImplicitArg(Implicits.scala:884)
[error] dotty.tools.dotc.typer.Implicits.inferImplicitArg$(Implicits.scala:818)
[error] dotty.tools.dotc.typer.Typer.inferImplicitArg(Typer.scala:116)
[error] dotty.tools.dotc.typer.Typer.implicitArgs$1(Typer.scala:3737)
[error] dotty.tools.dotc.typer.Typer.addImplicitArgs$1(Typer.scala:3773)
[error] dotty.tools.dotc.typer.Typer.adaptNoArgsImplicitMethod$1(Typer.scala:3849)
[error] dotty.tools.dotc.typer.Typer.adaptNoArgs$1(Typer.scala:4038)
[error] dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:4268)
[error] dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3587)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:3184)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:3188)
[error] dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:3300)
[error] dotty.tools.dotc.typer.Namer.typedAheadExpr$$anonfun$1(Namer.scala:1653)
[error] dotty.tools.dotc.typer.Namer.typedAhead(Namer.scala:1643)
[error] dotty.tools.dotc.typer.Namer.typedAheadExpr(Namer.scala:1653)
[error] dotty.tools.dotc.typer.Namer$ClassCompleter.typedParentApplication$1(Namer.scala:1489)
[error] dotty.tools.dotc.typer.Namer$ClassCompleter.parentType$1(Namer.scala:1509)
[error] dotty.tools.dotc.typer.Namer$ClassCompleter.checkedParentType$1(Namer.scala:1519)
[error] dotty.tools.dotc.typer.Namer$ClassCompleter.$anonfun$29(Namer.scala:1592)
[error] scala.collection.immutable.List.map(List.scala:246)
[error] dotty.tools.dotc.typer.Namer$ClassCompleter.completeInCreationContext(Namer.scala:1592)
[error] dotty.tools.dotc.typer.Namer$Completer.complete(Namer.scala:814)
[error] dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:174)
[error] dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:187)
[error] dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:189)
[error] dotty.tools.dotc.core.SymDenotations$SymDenotation.ensureCompleted(SymDenotations.scala:393)
[error] dotty.tools.dotc.typer.Typer.retrieveSym(Typer.scala:2989)
[error] dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:3014)
[error] dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3111)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:3184)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:3188)
[error] dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:3210)
[error] dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:3256)
[error] dotty.tools.dotc.typer.Typer.typedPackageDef(Typer.scala:2812)
[error] dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:3081)
[error] dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3112)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:3184)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:3188)
[error] dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:3300)
[error] dotty.tools.dotc.typer.TyperPhase.typeCheck$$anonfun$1(TyperPhase.scala:44)
[error] dotty.tools.dotc.typer.TyperPhase.typeCheck$$anonfun$adapted$1(TyperPhase.scala:54)
[error] scala.Function0.apply$mcV$sp(Function0.scala:42)
[error] dotty.tools.dotc.core.Phases$Phase.monitor(Phases.scala:440)
[error] dotty.tools.dotc.typer.TyperPhase.typeCheck(TyperPhase.scala:54)
[error] dotty.tools.dotc.typer.TyperPhase.runOn$$anonfun$3(TyperPhase.scala:88)
[error] scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error] scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error] scala.collection.immutable.List.foreach(List.scala:333)
[error] dotty.tools.dotc.typer.TyperPhase.runOn(TyperPhase.scala:88)
[error] dotty.tools.dotc.Run.runPhases$1$$anonfun$1(Run.scala:246)
[error] scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error] scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error] scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1321)
[error] dotty.tools.dotc.Run.runPhases$1(Run.scala:262)
[error] dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:270)
[error] dotty.tools.dotc.Run.compileUnits$$anonfun$adapted$1(Run.scala:279)
[error] dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:67)
[error] dotty.tools.dotc.Run.compileUnits(Run.scala:279)
[error] dotty.tools.dotc.Run.compileSources(Run.scala:194)
[error] dotty.tools.dotc.Run.compile(Run.scala:179)
[error] dotty.tools.dotc.Driver.doCompile(Driver.scala:37)
[error] dotty.tools.xsbt.CompilerBridgeDriver.run(CompilerBridgeDriver.java:88)
[error] dotty.tools.xsbt.CompilerBridge.run(CompilerBridge.java:22)
[error] sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:91)
[error] sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$7(MixedAnalyzingCompiler.scala:192)
[error] scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
[error] sbt.internal.inc.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:247)
[error] sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4(MixedAnalyzingCompiler.scala:182)
[error] sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4$adapted(MixedAnalyzingCompiler.scala:163)
[error] sbt.internal.inc.JarUtils$.withPreviousJar(JarUtils.scala:239)
[error] sbt.internal.inc.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:163)
[error] sbt.internal.inc.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:210)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1(IncrementalCompilerImpl.scala:528)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1$adapted(IncrementalCompilerImpl.scala:528)
[error] sbt.internal.inc.Incremental$.$anonfun$apply$5(Incremental.scala:177)
[error] sbt.internal.inc.Incremental$.$anonfun$apply$5$adapted(Incremental.scala:175)
[error] sbt.internal.inc.Incremental$$anon$2.run(Incremental.scala:461)
[error] sbt.internal.inc.IncrementalCommon$CycleState.next(IncrementalCommon.scala:116)
[error] sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:56)
[error] sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:52)
[error] sbt.internal.inc.IncrementalCommon.cycle(IncrementalCommon.scala:263)
[error] sbt.internal.inc.Incremental$.$anonfun$incrementalCompile$8(Incremental.scala:416)
[error] sbt.internal.inc.Incremental$.withClassfileManager(Incremental.scala:503)
[error] sbt.internal.inc.Incremental$.incrementalCompile(Incremental.scala:403)
[error] sbt.internal.inc.Incremental$.apply(Incremental.scala:169)
[error] sbt.internal.inc.IncrementalCompilerImpl.compileInternal(IncrementalCompilerImpl.scala:528)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileIncrementally$1(IncrementalCompilerImpl.scala:482)
[error] sbt.internal.inc.IncrementalCompilerImpl.handleCompilationError(IncrementalCompilerImpl.scala:332)
[error] sbt.internal.inc.IncrementalCompilerImpl.compileIncrementally(IncrementalCompilerImpl.scala:420)
[error] sbt.internal.inc.IncrementalCompilerImpl.compile(IncrementalCompilerImpl.scala:137)
[error] sbt.Defaults$.compileIncrementalTaskImpl(Defaults.scala:2366)
[error] sbt.Defaults$.$anonfun$compileIncrementalTask$2(Defaults.scala:2316)
[error] sbt.internal.server.BspCompileTask$.$anonfun$compute$1(BspCompileTask.scala:30)
[error] sbt.internal.io.Retry$.apply(Retry.scala:46)
[error] sbt.internal.io.Retry$.apply(Retry.scala:28)
[error] sbt.internal.io.Retry$.apply(Retry.scala:23)
[error] sbt.internal.server.BspCompileTask$.compute(BspCompileTask.scala:30)
[error] sbt.Defaults$.$anonfun$compileIncrementalTask$1(Defaults.scala:2314)
[error] scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error] sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
[error] sbt.std.Transform$$anon$4.work(Transform.scala:68)
[error] sbt.Execute.$anonfun$submit$2(Execute.scala:282)
[error] sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
[error] sbt.Execute.work(Execute.scala:291)
[error] sbt.Execute.$anonfun$submit$1(Execute.scala:282)
[error] sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error] sbt.CompletionService$$anon$2.call(CompletionService.scala:64)
[error] java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
[error] java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
[error] java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
[error] java.base/java.lang.Thread.run(Thread.java:833)
[error]            
[error] java.lang.Error: internal error: type of Mirror.*Of argument T is not fully defined, pos = compilerBug.scala:7
[error] 	at dotty.tools.dotc.typer.Inferencing$.fullyDefinedType(Inferencing.scala:46)
[error] 	at dotty.tools.dotc.typer.Synthesizer.makeMirror(Synthesizer.scala:575)
[error] 	at dotty.tools.dotc.typer.Synthesizer.$init$$$anonfun$6$$anonfun$1(Synthesizer.scala:585)
[error] 	at dotty.tools.dotc.typer.Synthesizer.recur$1(Synthesizer.scala:738)
[error] 	at dotty.tools.dotc.typer.Synthesizer.recur$1$$anonfun$1(Synthesizer.scala:740)
[error] 	at dotty.tools.dotc.typer.Synthesizer$.dotty$tools$dotc$typer$Synthesizer$$$orElse(Synthesizer.scala:759)
[error] 	at dotty.tools.dotc.typer.Synthesizer.recur$1(Synthesizer.scala:740)
[error] 	at dotty.tools.dotc.typer.Synthesizer.recur$1$$anonfun$1(Synthesizer.scala:740)
[error] 	at dotty.tools.dotc.typer.Synthesizer$.dotty$tools$dotc$typer$Synthesizer$$$orElse(Synthesizer.scala:759)
[error] 	at dotty.tools.dotc.typer.Synthesizer.recur$1(Synthesizer.scala:740)
[error] 	at dotty.tools.dotc.typer.Synthesizer.recur$1$$anonfun$1(Synthesizer.scala:740)
[error] 	at dotty.tools.dotc.typer.Synthesizer$.dotty$tools$dotc$typer$Synthesizer$$$orElse(Synthesizer.scala:759)
[error] 	at dotty.tools.dotc.typer.Synthesizer.recur$1(Synthesizer.scala:740)
[error] 	at dotty.tools.dotc.typer.Synthesizer.recur$1$$anonfun$1(Synthesizer.scala:740)
[error] 	at dotty.tools.dotc.typer.Synthesizer$.dotty$tools$dotc$typer$Synthesizer$$$orElse(Synthesizer.scala:759)
[error] 	at dotty.tools.dotc.typer.Synthesizer.recur$1(Synthesizer.scala:740)
[error] 	at dotty.tools.dotc.typer.Synthesizer.recur$1$$anonfun$1(Synthesizer.scala:740)
[error] 	at dotty.tools.dotc.typer.Synthesizer$.dotty$tools$dotc$typer$Synthesizer$$$orElse(Synthesizer.scala:759)
[error] 	at dotty.tools.dotc.typer.Synthesizer.recur$1(Synthesizer.scala:740)
[error] 	at dotty.tools.dotc.typer.Synthesizer.tryAll(Synthesizer.scala:743)
[error] 	at dotty.tools.dotc.typer.Implicits.inferImplicitArg(Implicits.scala:890)
[error] 	at dotty.tools.dotc.typer.Implicits.inferImplicitArg$(Implicits.scala:818)
[error] 	at dotty.tools.dotc.typer.Typer.inferImplicitArg(Typer.scala:116)
[error] 	at dotty.tools.dotc.typer.Typer.implicitArgs$1(Typer.scala:3737)
[error] 	at dotty.tools.dotc.typer.Typer.addImplicitArgs$1(Typer.scala:3773)
[error] 	at dotty.tools.dotc.typer.Typer.adaptNoArgsImplicitMethod$1(Typer.scala:3849)
[error] 	at dotty.tools.dotc.typer.Typer.adaptNoArgs$1(Typer.scala:4038)
[error] 	at dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:4268)
[error] 	at dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3587)
[error] 	at dotty.tools.dotc.typer.Typer.readapt$1(Typer.scala:3598)
[error] 	at dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:4255)
[error] 	at dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3587)
[error] 	at dotty.tools.dotc.typer.Implicits.typedImplicit(Implicits.scala:1117)
[error] 	at dotty.tools.dotc.typer.Implicits.typedImplicit$(Implicits.scala:818)
[error] 	at dotty.tools.dotc.typer.Typer.typedImplicit(Typer.scala:116)
[error] 	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.tryImplicit(Implicits.scala:1242)
[error] 	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.rank$1(Implicits.scala:1341)
[error] 	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1511)
[error] 	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1539)
[error] 	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1547)
[error] 	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.bestImplicit(Implicits.scala:1572)
[error] 	at dotty.tools.dotc.typer.Implicits.inferImplicit(Implicits.scala:1060)
[error] 	at dotty.tools.dotc.typer.Implicits.inferImplicit$(Implicits.scala:818)
[error] 	at dotty.tools.dotc.typer.Typer.inferImplicit(Typer.scala:116)
[error] 	at dotty.tools.dotc.typer.Implicits.inferImplicitArg(Implicits.scala:884)
[error] 	at dotty.tools.dotc.typer.Implicits.inferImplicitArg$(Implicits.scala:818)
[error] 	at dotty.tools.dotc.typer.Typer.inferImplicitArg(Typer.scala:116)
[error] 	at dotty.tools.dotc.typer.Typer.implicitArgs$1(Typer.scala:3737)
[error] 	at dotty.tools.dotc.typer.Typer.addImplicitArgs$1(Typer.scala:3773)
[error] 	at dotty.tools.dotc.typer.Typer.adaptNoArgsImplicitMethod$1(Typer.scala:3849)
[error] 	at dotty.tools.dotc.typer.Typer.adaptNoArgs$1(Typer.scala:4038)
[error] 	at dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:4268)
[error] 	at dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3587)
[error] 	at dotty.tools.dotc.typer.Typer.readapt$1(Typer.scala:3598)
[error] 	at dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:4255)
[error] 	at dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3587)
[error] 	at dotty.tools.dotc.typer.Implicits.typedImplicit(Implicits.scala:1117)
[error] 	at dotty.tools.dotc.typer.Implicits.typedImplicit$(Implicits.scala:818)
[error] 	at dotty.tools.dotc.typer.Typer.typedImplicit(Typer.scala:116)
[error] 	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.tryImplicit(Implicits.scala:1242)
[error] 	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.rank$1(Implicits.scala:1341)
[error] 	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1511)
[error] 	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1539)
[error] 	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1547)
[error] 	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.bestImplicit(Implicits.scala:1572)
[error] 	at dotty.tools.dotc.typer.Implicits.inferImplicit(Implicits.scala:1060)
[error] 	at dotty.tools.dotc.typer.Implicits.inferImplicit$(Implicits.scala:818)
[error] 	at dotty.tools.dotc.typer.Typer.inferImplicit(Typer.scala:116)
[error] 	at dotty.tools.dotc.typer.Implicits.inferImplicitArg(Implicits.scala:884)
[error] 	at dotty.tools.dotc.typer.Implicits.inferImplicitArg$(Implicits.scala:818)
[error] 	at dotty.tools.dotc.typer.Typer.inferImplicitArg(Typer.scala:116)
[error] 	at dotty.tools.dotc.typer.Typer.implicitArgs$1(Typer.scala:3737)
[error] 	at dotty.tools.dotc.typer.Typer.addImplicitArgs$1(Typer.scala:3773)
[error] 	at dotty.tools.dotc.typer.Typer.adaptNoArgsImplicitMethod$1(Typer.scala:3849)
[error] 	at dotty.tools.dotc.typer.Typer.adaptNoArgs$1(Typer.scala:4038)
[error] 	at dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:4268)
[error] 	at dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3587)
[error] 	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:3184)
[error] 	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:3188)
[error] 	at dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:3300)
[error] 	at dotty.tools.dotc.typer.Namer.typedAheadExpr$$anonfun$1(Namer.scala:1653)
[error] 	at dotty.tools.dotc.typer.Namer.typedAhead(Namer.scala:1643)
[error] 	at dotty.tools.dotc.typer.Namer.typedAheadExpr(Namer.scala:1653)
[error] 	at dotty.tools.dotc.typer.Namer$ClassCompleter.typedParentApplication$1(Namer.scala:1489)
[error] 	at dotty.tools.dotc.typer.Namer$ClassCompleter.parentType$1(Namer.scala:1509)
[error] 	at dotty.tools.dotc.typer.Namer$ClassCompleter.checkedParentType$1(Namer.scala:1519)
[error] 	at dotty.tools.dotc.typer.Namer$ClassCompleter.$anonfun$29(Namer.scala:1592)
[error] 	at scala.collection.immutable.List.map(List.scala:246)
[error] 	at dotty.tools.dotc.typer.Namer$ClassCompleter.completeInCreationContext(Namer.scala:1592)
[error] 	at dotty.tools.dotc.typer.Namer$Completer.complete(Namer.scala:814)
[error] 	at dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:174)
[error] 	at dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:187)
[error] 	at dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:189)
[error] 	at dotty.tools.dotc.core.SymDenotations$SymDenotation.ensureCompleted(SymDenotations.scala:393)
[error] 	at dotty.tools.dotc.typer.Typer.retrieveSym(Typer.scala:2989)
[error] 	at dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:3014)
[error] 	at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3111)
[error] 	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:3184)
[error] 	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:3188)
[error] 	at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:3210)
[error] 	at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:3256)
[error] 	at dotty.tools.dotc.typer.Typer.typedPackageDef(Typer.scala:2812)
[error] 	at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:3081)
[error] 	at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3112)
[error] 	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:3184)
[error] 	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:3188)
[error] 	at dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:3300)
[error] 	at dotty.tools.dotc.typer.TyperPhase.typeCheck$$anonfun$1(TyperPhase.scala:44)
[error] 	at dotty.tools.dotc.typer.TyperPhase.typeCheck$$anonfun$adapted$1(TyperPhase.scala:54)
[error] 	at scala.Function0.apply$mcV$sp(Function0.scala:42)
[error] 	at dotty.tools.dotc.core.Phases$Phase.monitor(Phases.scala:440)
[error] 	at dotty.tools.dotc.typer.TyperPhase.typeCheck(TyperPhase.scala:54)
[error] 	at dotty.tools.dotc.typer.TyperPhase.runOn$$anonfun$3(TyperPhase.scala:88)
[error] 	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error] 	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error] 	at scala.collection.immutable.List.foreach(List.scala:333)
[error] 	at dotty.tools.dotc.typer.TyperPhase.runOn(TyperPhase.scala:88)
[error] 	at dotty.tools.dotc.Run.runPhases$1$$anonfun$1(Run.scala:246)
[error] 	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error] 	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error] 	at scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1321)
[error] 	at dotty.tools.dotc.Run.runPhases$1(Run.scala:262)
[error] 	at dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:270)
[error] 	at dotty.tools.dotc.Run.compileUnits$$anonfun$adapted$1(Run.scala:279)
[error] 	at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:67)
[error] 	at dotty.tools.dotc.Run.compileUnits(Run.scala:279)
[error] 	at dotty.tools.dotc.Run.compileSources(Run.scala:194)
[error] 	at dotty.tools.dotc.Run.compile(Run.scala:179)
[error] 	at dotty.tools.dotc.Driver.doCompile(Driver.scala:37)
[error] 	at dotty.tools.xsbt.CompilerBridgeDriver.run(CompilerBridgeDriver.java:88)
[error] 	at dotty.tools.xsbt.CompilerBridge.run(CompilerBridge.java:22)
[error] 	at sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:91)
[error] 	at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$7(MixedAnalyzingCompiler.scala:192)
[error] 	at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
[error] 	at sbt.internal.inc.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:247)
[error] 	at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4(MixedAnalyzingCompiler.scala:182)
[error] 	at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4$adapted(MixedAnalyzingCompiler.scala:163)
[error] 	at sbt.internal.inc.JarUtils$.withPreviousJar(JarUtils.scala:239)
[error] 	at sbt.internal.inc.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:163)
[error] 	at sbt.internal.inc.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:210)
[error] 	at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1(IncrementalCompilerImpl.scala:528)
[error] 	at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1$adapted(IncrementalCompilerImpl.scala:528)
[error] 	at sbt.internal.inc.Incremental$.$anonfun$apply$5(Incremental.scala:177)
[error] 	at sbt.internal.inc.Incremental$.$anonfun$apply$5$adapted(Incremental.scala:175)
[error] 	at sbt.internal.inc.Incremental$$anon$2.run(Incremental.scala:461)
[error] 	at sbt.internal.inc.IncrementalCommon$CycleState.next(IncrementalCommon.scala:116)
[error] 	at sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:56)
[error] 	at sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:52)
[error] 	at sbt.internal.inc.IncrementalCommon.cycle(IncrementalCommon.scala:263)
[error] 	at sbt.internal.inc.Incremental$.$anonfun$incrementalCompile$8(Incremental.scala:416)
[error] 	at sbt.internal.inc.Incremental$.withClassfileManager(Incremental.scala:503)
[error] 	at sbt.internal.inc.Incremental$.incrementalCompile(Incremental.scala:403)
[error] 	at sbt.internal.inc.Incremental$.apply(Incremental.scala:169)
[error] 	at sbt.internal.inc.IncrementalCompilerImpl.compileInternal(IncrementalCompilerImpl.scala:528)
[error] 	at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileIncrementally$1(IncrementalCompilerImpl.scala:482)
[error] 	at sbt.internal.inc.IncrementalCompilerImpl.handleCompilationError(IncrementalCompilerImpl.scala:332)
[error] 	at sbt.internal.inc.IncrementalCompilerImpl.compileIncrementally(IncrementalCompilerImpl.scala:420)
[error] 	at sbt.internal.inc.IncrementalCompilerImpl.compile(IncrementalCompilerImpl.scala:137)
[error] 	at sbt.Defaults$.compileIncrementalTaskImpl(Defaults.scala:2366)
[error] 	at sbt.Defaults$.$anonfun$compileIncrementalTask$2(Defaults.scala:2316)
[error] 	at sbt.internal.server.BspCompileTask$.$anonfun$compute$1(BspCompileTask.scala:30)
[error] 	at sbt.internal.io.Retry$.apply(Retry.scala:46)
[error] 	at sbt.internal.io.Retry$.apply(Retry.scala:28)
[error] 	at sbt.internal.io.Retry$.apply(Retry.scala:23)
[error] 	at sbt.internal.server.BspCompileTask$.compute(BspCompileTask.scala:30)
[error] 	at sbt.Defaults$.$anonfun$compileIncrementalTask$1(Defaults.scala:2314)
[error] 	at scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error] 	at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
[error] 	at sbt.std.Transform$$anon$4.work(Transform.scala:68)
[error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:282)
[error] 	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
[error] 	at sbt.Execute.work(Execute.scala:291)
[error] 	at sbt.Execute.$anonfun$submit$1(Execute.scala:282)
[error] 	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:64)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
[error] 	at java.base/java.lang.Thread.run(Thread.java:833)
[error] (Compile / compileIncremental) java.lang.Error: internal error: type of Mirror.*Of argument T is not fully defined, pos = compilerBug.scala:7
[error] Total time: 2 s, completed Oct 9, 2023, 4:36:08 PM
@PawkyPenguin PawkyPenguin added itype:bug itype:crash stat:needs triage Every issue needs to have an "area" and "itype" label labels Oct 9, 2023
@PawkyPenguin
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PawkyPenguin commented Oct 9, 2023 •
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Possibly related issues I found (crash in same method, Inferencing$.fullyDefinedType):

@bishabosha
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bishabosha commented Oct 13, 2023 •
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minimised with

import scala.deriving.Mirror

type TC[A]

object TC:
  inline given derived[A](using Mirror.Of[A]): TC[A] = ???

abstract class Payload[A <: Payload[A]: TC]()

case class Summary() extends Payload() // error: crash

if you explicitly pass the type Summary, rather than infer it then it works fine

case class Summary() extends Payload[Summary]() // ok

@bishabosha bishabosha self-assigned this Oct 13, 2023
@bishabosha bishabosha added area:typeclass-derivation and removed stat:needs triage Every issue needs to have an "area" and "itype" label labels Oct 13, 2023
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