Summoning top level in a trait crashes the compiler

[XDracam]

Compiler version

3.3.1

Minimized code

trait Bar

trait TestBug:
  summon[Bar]

Output (click arrow to expand)

scala: ## Exception when compiling 3 sources to C:\Users\Reusc\Desktop\thesis\code\scala\target\scala-3.3.1\classes
java.lang.AssertionError: assertion failed
scala.runtime.Scala3RunTime$.assertFailed(Scala3RunTime.scala:11)
dotty.tools.dotc.ast.tpd$.TypeApply(tpd.scala:60)
dotty.tools.dotc.ast.tpd$TreeOps$.appliedToTypeTrees$extension(tpd.scala:985)
dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:4255)
dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3587)
dotty.tools.dotc.typer.ProtoTypes$FunProto.typedArg(ProtoTypes.scala:497)
dotty.tools.dotc.typer.Applications$ApplyToUntyped.typedArg(Applications.scala:897)
dotty.tools.dotc.typer.Applications$ApplyToUntyped.typedArg(Applications.scala:897)
dotty.tools.dotc.typer.Applications$Application.addTyped$1(Applications.scala:589)
dotty.tools.dotc.typer.Applications$Application.matchArgs(Applications.scala:653)
dotty.tools.dotc.typer.Applications$Application.init(Applications.scala:492)
dotty.tools.dotc.typer.Applications$TypedApply.<init>(Applications.scala:779)
dotty.tools.dotc.typer.Applications$ApplyToUntyped.<init>(Applications.scala:896)
dotty.tools.dotc.typer.Applications.ApplyTo(Applications.scala:1126)
dotty.tools.dotc.typer.Applications.ApplyTo$(Applications.scala:352)
dotty.tools.dotc.typer.Typer.ApplyTo(Typer.scala:116)
dotty.tools.dotc.typer.Applications.simpleApply$1(Applications.scala:969)
dotty.tools.dotc.typer.Applications.realApply$1$$anonfun$2(Applications.scala:1052)
dotty.tools.dotc.typer.Typer.tryEither(Typer.scala:3324)
dotty.tools.dotc.typer.Applications.realApply$1(Applications.scala:1063)
dotty.tools.dotc.typer.Applications.typedApply(Applications.scala:1101)
dotty.tools.dotc.typer.Applications.typedApply$(Applications.scala:352)
dotty.tools.dotc.typer.Typer.typedApply(Typer.scala:116)
dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:3048)
dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3112)
dotty.tools.dotc.typer.Typer.typed(Typer.scala:3184)
dotty.tools.dotc.typer.Implicits.tryConversion$1(Implicits.scala:1136)
dotty.tools.dotc.typer.Implicits.typedImplicit(Implicits.scala:1167)
dotty.tools.dotc.typer.Implicits.typedImplicit$(Implicits.scala:818)
dotty.tools.dotc.typer.Typer.typedImplicit(Typer.scala:116)
dotty.tools.dotc.typer.Implicits$ImplicitSearch.tryImplicit(Implicits.scala:1242)
dotty.tools.dotc.typer.Implicits$ImplicitSearch.rank$1(Implicits.scala:1341)
dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1511)
dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1539)
dotty.tools.dotc.typer.Implicits$ImplicitSearch.searchImplicit(Implicits.scala:1547)
dotty.tools.dotc.typer.Implicits$ImplicitSearch.bestImplicit(Implicits.scala:1572)
dotty.tools.dotc.typer.Implicits.inferImplicit(Implicits.scala:1060)
dotty.tools.dotc.typer.Implicits.inferImplicit$(Implicits.scala:818)
dotty.tools.dotc.typer.Typer.inferImplicit(Typer.scala:116)
dotty.tools.dotc.typer.Implicits.inferView(Implicits.scala:856)
dotty.tools.dotc.typer.Implicits.inferView$(Implicits.scala:818)
dotty.tools.dotc.typer.Typer.inferView(Typer.scala:116)
dotty.tools.dotc.typer.Implicits.viewExists(Implicits.scala:831)
dotty.tools.dotc.typer.Implicits.viewExists$(Implicits.scala:818)
dotty.tools.dotc.typer.Typer.viewExists(Typer.scala:116)
dotty.tools.dotc.typer.Implicits.ignoredConvertibleImplicits$1$$anonfun$3(Implicits.scala:960)
scala.collection.Iterator$$anon$6.hasNext(Iterator.scala:479)
scala.collection.Iterator.isEmpty(Iterator.scala:466)
scala.collection.Iterator.isEmpty$(Iterator.scala:466)
scala.collection.AbstractIterator.isEmpty(Iterator.scala:1300)
scala.collection.View$Filter.isEmpty(View.scala:146)
scala.collection.IterableOnceOps.nonEmpty(IterableOnce.scala:833)
scala.collection.IterableOnceOps.nonEmpty$(IterableOnce.scala:833)
scala.collection.AbstractIterable.nonEmpty(Iterable.scala:933)
dotty.tools.dotc.reporting.MissingImplicitArgument.noChainConversionsNote$1(messages.scala:2838)
dotty.tools.dotc.reporting.MissingImplicitArgument.msgPostscript$$anonfun$4(messages.scala:2846)
scala.Option.orElse(Option.scala:477)
dotty.tools.dotc.reporting.MissingImplicitArgument.msgPostscript(messages.scala:2846)
dotty.tools.dotc.reporting.Message.message$$anonfun$1(Message.scala:345)
dotty.tools.dotc.reporting.Message.inMessageContext(Message.scala:341)
dotty.tools.dotc.reporting.Message.message(Message.scala:345)
dotty.tools.dotc.reporting.Message.isNonSensical(Message.scala:322)
dotty.tools.dotc.reporting.HideNonSensicalMessages.isHidden(HideNonSensicalMessages.scala:16)
dotty.tools.dotc.reporting.HideNonSensicalMessages.isHidden$(HideNonSensicalMessages.scala:10)
dotty.tools.dotc.reporting.AbstractReporter.isHidden(AbstractReporter.scala:8)
dotty.tools.dotc.reporting.Reporter.issueUnconfigured(Reporter.scala:156)
dotty.tools.dotc.reporting.Reporter.go$1(Reporter.scala:181)
dotty.tools.dotc.reporting.Reporter.issueIfNotSuppressed(Reporter.scala:200)
dotty.tools.dotc.reporting.Reporter.report(Reporter.scala:203)
dotty.tools.dotc.report$.error(report.scala:68)
dotty.tools.dotc.typer.Typer.issueErrors$1$$anonfun$1(Typer.scala:3808)
scala.runtime.function.JProcedure3.apply(JProcedure3.java:15)
scala.runtime.function.JProcedure3.apply(JProcedure3.java:10)
scala.collection.LazyZip3.foreach(LazyZipOps.scala:248)
dotty.tools.dotc.typer.Typer.issueErrors$1(Typer.scala:3810)
dotty.tools.dotc.typer.Typer.addImplicitArgs$1(Typer.scala:3832)
dotty.tools.dotc.typer.Typer.adaptNoArgsImplicitMethod$1(Typer.scala:3849)
dotty.tools.dotc.typer.Typer.adaptNoArgs$1(Typer.scala:4038)
dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:4268)
dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3587)
dotty.tools.dotc.typer.Typer.typed(Typer.scala:3184)
dotty.tools.dotc.typer.Typer.typed(Typer.scala:3188)
dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:3237)
dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:3256)
dotty.tools.dotc.typer.Typer.typedClassDef(Typer.scala:2669)
dotty.tools.dotc.typer.Typer.typedTypeOrClassDef$1(Typer.scala:3036)
dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:3040)
dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3111)
dotty.tools.dotc.typer.Typer.typed(Typer.scala:3184)
dotty.tools.dotc.typer.Typer.typed(Typer.scala:3188)
dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:3210)
dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:3256)
dotty.tools.dotc.typer.Typer.typedPackageDef(Typer.scala:2812)
dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:3081)
dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3112)
dotty.tools.dotc.typer.Typer.typed(Typer.scala:3184)
dotty.tools.dotc.typer.Typer.typed(Typer.scala:3188)
dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:3300)
dotty.tools.dotc.typer.TyperPhase.typeCheck$$anonfun$1(TyperPhase.scala:44)
dotty.tools.dotc.typer.TyperPhase.typeCheck$$anonfun$adapted$1(TyperPhase.scala:54)
scala.Function0.apply$mcV$sp(Function0.scala:42)
dotty.tools.dotc.core.Phases$Phase.monitor(Phases.scala:440)
dotty.tools.dotc.typer.TyperPhase.typeCheck(TyperPhase.scala:54)
dotty.tools.dotc.typer.TyperPhase.runOn$$anonfun$3(TyperPhase.scala:88)
scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
scala.collection.immutable.List.foreach(List.scala:333)
dotty.tools.dotc.typer.TyperPhase.runOn(TyperPhase.scala:88)
dotty.tools.dotc.Run.runPhases$1$$anonfun$1(Run.scala:246)
scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1321)
dotty.tools.dotc.Run.runPhases$1(Run.scala:262)
dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:270)
dotty.tools.dotc.Run.compileUnits$$anonfun$adapted$1(Run.scala:279)
dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:67)
dotty.tools.dotc.Run.compileUnits(Run.scala:279)
dotty.tools.dotc.Run.compileSources(Run.scala:194)
dotty.tools.dotc.Run.compile(Run.scala:179)
dotty.tools.dotc.Driver.doCompile(Driver.scala:37)
dotty.tools.xsbt.CompilerBridgeDriver.run(CompilerBridgeDriver.java:88)
dotty.tools.xsbt.CompilerBridge.run(CompilerBridge.java:22)
sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:91)
sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$7(MixedAnalyzingCompiler.scala:193)
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
sbt.internal.inc.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:248)
sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4(MixedAnalyzingCompiler.scala:183)
sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4$adapted(MixedAnalyzingCompiler.scala:163)
sbt.internal.inc.JarUtils$.withPreviousJar(JarUtils.scala:239)
sbt.internal.inc.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:163)
sbt.internal.inc.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:211)
sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1(IncrementalCompilerImpl.scala:534)
sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1$adapted(IncrementalCompilerImpl.scala:534)
sbt.internal.inc.Incremental$.$anonfun$apply$5(Incremental.scala:179)
sbt.internal.inc.Incremental$.$anonfun$apply$5$adapted(Incremental.scala:177)
sbt.internal.inc.Incremental$$anon$2.run(Incremental.scala:463)
sbt.internal.inc.IncrementalCommon$CycleState.next(IncrementalCommon.scala:116)
sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:56)
sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:52)
sbt.internal.inc.IncrementalCommon.cycle(IncrementalCommon.scala:263)
sbt.internal.inc.Incremental$.$anonfun$incrementalCompile$8(Incremental.scala:418)
sbt.internal.inc.Incremental$.withClassfileManager(Incremental.scala:505)
sbt.internal.inc.Incremental$.incrementalCompile(Incremental.scala:405)
sbt.internal.inc.Incremental$.apply(Incremental.scala:171)
sbt.internal.inc.IncrementalCompilerImpl.compileInternal(IncrementalCompilerImpl.scala:534)
sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileIncrementally$1(IncrementalCompilerImpl.scala:488)
sbt.internal.inc.IncrementalCompilerImpl.handleCompilationError(IncrementalCompilerImpl.scala:332)
sbt.internal.inc.IncrementalCompilerImpl.compileIncrementally(IncrementalCompilerImpl.scala:425)
sbt.internal.inc.IncrementalCompilerImpl.compile(IncrementalCompilerImpl.scala:137)
org.jetbrains.jps.incremental.scala.local.SbtCompiler.$anonfun$doCompile$4(SbtCompiler.scala:95)
scala.util.Try$.apply(Try.scala:210)
org.jetbrains.jps.incremental.scala.local.SbtCompiler.doCompile(SbtCompiler.scala:93)
org.jetbrains.jps.incremental.scala.local.SbtCompiler.compile(SbtCompiler.scala:21)
org.jetbrains.jps.incremental.scala.local.LocalServer.doCompile(LocalServer.scala:47)
org.jetbrains.jps.incremental.scala.local.LocalServer.compile(LocalServer.scala:25)
org.jetbrains.jps.incremental.scala.remote.Main$.compileLogic(Main.scala:208)
org.jetbrains.jps.incremental.scala.remote.Main$.$anonfun$handleCommand$1(Main.scala:193)
org.jetbrains.jps.incremental.scala.remote.Main$.decorated$1(Main.scala:180)
org.jetbrains.jps.incremental.scala.remote.Main$.handleCommand(Main.scala:190)
org.jetbrains.jps.incremental.scala.remote.Main$.serverLogic(Main.scala:163)
org.jetbrains.jps.incremental.scala.remote.Main$.nailMain(Main.scala:103)
org.jetbrains.jps.incremental.scala.remote.Main.nailMain(Main.scala)
jdk.internal.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.base/java.lang.reflect.Method.invoke(Method.java:568)
com.facebook.nailgun.NGSession.runImpl(NGSession.java:312)
com.facebook.nailgun.NGSession.run(NGSession.java:198)

[som-snytt]

It does not reproduce with scalac.

The stacktrace implicates intellij.

org.jetbrains.jps.incremental.scala.local.SbtCompiler.$anonfun$doCompile$4(SbtCompiler.scala:95)

The compiler is just emitting the error. dotty.tools.dotc.report$.error(report.scala:68) Is it trying to add a helpful footnote about implicits?

[som-snytt]

Seems to be same as #18999

Not closing because this minimization is arguably more elegant, and possibly is eligible for some sort of shortest bug award.

[XDracam]

I finally got metals running in WSL (can't get it to work in windows for some reason) and:

• things work in Metals in VSCode
• I get the exception when implicit resolution fails in IntelliJ

[som-snytt]

Maybe there is a difference in the reporter under metals. (The symptom is "downstream" of reporting an error.)

Because of -Wconf, I have become suspicious of all errors, which may reported, suppressed, or elevated.

I think the compiler needs an option for pure-report mode, by which all messaging is logged, irrespective of the "reporter" endpoint.

[som-snytt]

The canonical ticket is #18650 fixed in #18719
It was fixed on 3.4 and backported to 3.3.2 LTS.
There are several duplicate tickets.

Ask and ye shall receive. pure-report mode was implemented as -Yno-enrich-error-messages.