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e45lee opened this issue Jun 20, 2024 · 0 comments
Open

Modularity + TASTy serialization issue when compiling modified standard library #20707

e45lee opened this issue Jun 20, 2024 · 0 comments
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area:pickling itype:bug itype:crash stat:needs minimization Needs a self contained minimization

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@e45lee
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e45lee commented Jun 20, 2024

I'm running an experiment using the Scala standard library and I was modifying parts of it
to use the new experimental modularity feature (#20061) for annotating where type
parameters should be instantiated with singleton types. But the generated TASTy has
a cyclic reference somewhere so it all blows up.

I've managed to reproduce the issue by adding a new, dummy, class with the modularity Singletons
to the standard library. I'll try to reproduce on a smaller project later, but I'm not familiar with
TASTy serialization myself.

Compiler version

Latest main

Minimized code

Build changes:

diff --git a/build.sbt b/build.sbt
index f357044c91..d4d000e04d 100644
--- a/build.sbt
+++ b/build.sbt
@@ -37,6 +37,7 @@ val `community-build` = Build.`community-build`
 val `sbt-community-build` = Build.`sbt-community-build`
 val `scala3-presentation-compiler` = Build.`scala3-presentation-compiler`
 val `scala3-presentation-compiler-bootstrapped` = Build.`scala3-presentation-compiler-bootstrapped`
+val `scala2-library-modularity` = Build.`scala2-library-modularity`
 
 val sjsSandbox = Build.sjsSandbox
 val sjsJUnitTests = Build.sjsJUnitTests
diff --git a/project/Build.scala b/project/Build.scala
index c1a8800421..1f4f84d4b0 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -1076,6 +1076,21 @@ object Build {
     settings(scala2LibraryBootstrappedSettings).
     settings(moduleName := "scala2-library")
     // -Ycheck:all is set in project/scripts/scala2-library-tasty-mima.sh
+  
+  /** Scala 2 library compiled by dotty using the latest published sources of the library.
+   *
+   *  This version of the library is not (yet) TASTy/binary compatible with the Scala 2 compiled library.
+   */
+  lazy val `scala2-library-modularity` = project.in(file("scala2-library-modularity")).
+    withCommonSettings(Bootstrapped).
+    dependsOn(dottyCompiler(Bootstrapped) % "provided; compile->runtime; test->test").
+    settings(commonBootstrappedSettings).
+    settings(scala2LibraryBootstrappedSettings).
+    settings(moduleName := "scala2-library-checked").
+    settings(scalacOptions -= "-Yno:experimental").
+    settings(scalacOptions += "-language:experimental.modularity").
+    settings(scalacOptions += "-experimental")
+    // -Ycheck:all is set in project/scripts/scala2-library-tasty-mima.sh
 
   /** Scala 2 library compiled by dotty using the latest published sources of the library.
    *

Dummy class definition I added to List.scala that breaks TASTy.

// A dummy class for triggering the serialization error
final class Dummy[T: Singleton]() {
}

Output

I get a unpickler error followed by a subsequent crash.

[error] -- Error: /home/e45lee/scala-base/out/bootstrap/scala2-library-modularity/scala-3.5.1-RC1-bin-SNAPSHOT-nonbootstrapped/src_managed/main/scala-library-src/scala/collection/Iterable.scala:134:72 
[error] 134 |trait IterableOps[+A, +CC[_], +C] extends Any with IterableOnce[A] with IterableOnceOps[A, CC, C] {
[error]     |                                                                        ^
[error]     |Could not read definition constructor WitnessNames in /home/e45lee/scala-base/out/bootstrap/scala3-library-bootstrapped/scala-3.5.1-RC1-bin-SNAPSHOT-nonbootstrapped/classes/scala/annotation/internal/WitnessNames.tasty. Caused by the following exception:
[error]     |java.lang.AssertionError: assertion failed: Cyclic reference while unpickling definition at address 62 in unit /home/e45lee/scala-base/out/bootstrap/scala2-library-modularity/scala-3.5.1-RC1-bin-SNAPSHOT-nonbootstrapped/src_managed/main/scala-library-src/scala/collection/IterableOnce.scala
[error]     |    scala.runtime.Scala3RunTime$.assertFailed(Scala3RunTime.scala:8)
[error]     |    dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readIndexedDef(TreeUnpickler.scala:860)
[error]     |    dotty.tools.dotc.core.tasty.TreeUnpickler$Completer.complete(TreeUnpickler.scala:166)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:175)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:190)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:192)
[error]     |    dotty.tools.dotc.core.Denotations$SingleDenotation.computeAsSeenFrom(Denotations.scala:1130)
[error]     |    dotty.tools.dotc.core.Denotations$SingleDenotation.computeAsSeenFrom(Denotations.scala:1083)
[error]     |    dotty.tools.dotc.core.Denotations$PreDenotation.asSeenFrom(Denotations.scala:137)
[error]     |    dotty.tools.dotc.core.SymDenotations$ClassDenotation.findMember(SymDenotations.scala:2186)
[error]     |    dotty.tools.dotc.core.Types$Type.go$1(Types.scala:787)
[error]     |    dotty.tools.dotc.core.Types$Type.findMember(Types.scala:968)
[error]     |    dotty.tools.dotc.core.Types$Type.memberBasedOnFlags(Types.scala:760)
[error]     |    dotty.tools.dotc.core.Types$Type.nonPrivateMember(Types.scala:750)
[error]     |    dotty.tools.dotc.core.Types$NamedType.memberDenot(Types.scala:2592)
[error]     |    dotty.tools.dotc.core.Types$NamedType.memberDenot(Types.scala:2579)
[error]     |    dotty.tools.dotc.core.Types$NamedType.fromDesignator$1(Types.scala:2542)
[error]     |    dotty.tools.dotc.core.Types$NamedType.computeDenot(Types.scala:2559)
[error]     |    dotty.tools.dotc.core.Types$NamedType.denot(Types.scala:2514)
[error]     |    dotty.tools.dotc.core.Types$TermRef.isOverloaded(Types.scala:2999)
[error]     |    dotty.tools.dotc.core.Types$Type.widen(Types.scala:1317)
[error]     |    dotty.tools.dotc.typer.TypeAssigner.assignType(TypeAssigner.scala:298)
[error]     |    dotty.tools.dotc.typer.TypeAssigner.assignType$(TypeAssigner.scala:16)
[error]     |    dotty.tools.dotc.typer.Typer.assignType(Typer.scala:145)
[error]     |    dotty.tools.dotc.ast.tpd$.Apply(tpd.scala:48)
[error]     |    dotty.tools.dotc.ast.tpd$TreeOps$.appliedToTermArgs$extension(tpd.scala:942)
[error]     |    dotty.tools.dotc.ast.tpd$.New(tpd.scala:528)
[error]     |    dotty.tools.dotc.ast.tpd$.New(tpd.scala:519)
[error]     |    dotty.tools.dotc.ast.TreeInfo$WitnessNamesAnnot$.apply(TreeInfo.scala:394)
[error]     |    dotty.tools.dotc.ast.desugar$.desugarContextBounds(Desugar.scala:284)
[error]     |    dotty.tools.dotc.ast.desugar$.$anonfun$3(Desugar.scala:306)
[error]     |    scala.collection.immutable.List.mapConserve(List.scala:472)
[error]     |    dotty.tools.dotc.ast.desugar$.mapParamss$$anonfun$1(Desugar.scala:207)
[error]     |    scala.collection.immutable.List.mapConserve(List.scala:472)
[error]     |    dotty.tools.dotc.ast.desugar$.mapParamss(Desugar.scala:210)
[error]     |    dotty.tools.dotc.ast.desugar$.elimContextBounds(Desugar.scala:307)
[error]     |    dotty.tools.dotc.ast.desugar$.defDef(Desugar.scala:227)
[error]     |    dotty.tools.dotc.ast.desugar$.defTree(Desugar.scala:1480)
[error]     |    dotty.tools.dotc.typer.Namer.expand(Namer.scala:354)
[error]     |    dotty.tools.dotc.typer.Namer.expandTopLevel$1(Namer.scala:724)
[error]     |    dotty.tools.dotc.typer.Namer.index(Namer.scala:728)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.completeConstructor(Namer.scala:1520)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.completeInCreationContext(Namer.scala:1679)
[error]     |    dotty.tools.dotc.typer.Namer$Completer.complete(Namer.scala:850)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:175)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:190)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:192)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.ensureCompleted(SymDenotations.scala:393)
[error]     |    dotty.tools.dotc.typer.Namer$TypeDefCompleter.needsCompletion(Namer.scala:997)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:150)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:190)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:192)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.ensureCompleted(SymDenotations.scala:393)
[error]     |    dotty.tools.dotc.typer.Typer.typedArg$1(Typer.scala:2515)
[error]     |    dotty.tools.dotc.typer.Typer.$anonfun$53(Typer.scala:2535)
[error]     |    dotty.tools.dotc.core.Decorators$.zipWithConserve(Decorators.scala:160)
[error]     |    dotty.tools.dotc.typer.Typer.typedAppliedTypeTree(Typer.scala:2535)
[error]     |    dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:3461)
[error]     |    dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3519)
[error]     |    dotty.tools.dotc.typer.Typer.typed(Typer.scala:3596)
[error]     |    dotty.tools.dotc.typer.Typer.typed(Typer.scala:3600)
[error]     |    dotty.tools.dotc.typer.Typer.typedType(Typer.scala:3714)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.typedParentType$1(Namer.scala:1562)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.parentType$1$$anonfun$1(Namer.scala:1576)
[error]     |    dotty.tools.dotc.typer.Namer.typedAhead(Namer.scala:1737)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.parentType$1(Namer.scala:1576)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.checkedParentType$1(Namer.scala:1590)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.$anonfun$28(Namer.scala:1686)
[error]     |    scala.collection.immutable.List.map(List.scala:250)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.completeInCreationContext(Namer.scala:1686)
[error]     |    dotty.tools.dotc.typer.Namer$Completer.complete(Namer.scala:850)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:175)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:190)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:192)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.ensureCompleted(SymDenotations.scala:393)
[error]     |    dotty.tools.dotc.typer.Namer$TypeDefCompleter.needsCompletion(Namer.scala:997)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:150)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:190)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:192)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.ensureCompleted(SymDenotations.scala:393)
[error]     |    dotty.tools.dotc.typer.Typer.typedArg$1(Typer.scala:2515)
[error]     |    dotty.tools.dotc.typer.Typer.$anonfun$53(Typer.scala:2535)
[error]     |    dotty.tools.dotc.core.Decorators$.zipWithConserve(Decorators.scala:160)
[error]     |    dotty.tools.dotc.typer.Typer.typedAppliedTypeTree(Typer.scala:2535)
[error]     |    dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:3461)
[error]     |    dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3519)
[error]     |    dotty.tools.dotc.typer.Typer.typed(Typer.scala:3596)
[error]     |    dotty.tools.dotc.typer.Typer.typed(Typer.scala:3600)
[error]     |    dotty.tools.dotc.typer.Typer.typedType(Typer.scala:3714)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.typedParentType$1(Namer.scala:1562)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.parentType$1$$anonfun$1(Namer.scala:1576)
[error]     |    dotty.tools.dotc.typer.Namer.typedAhead(Namer.scala:1737)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.parentType$1(Namer.scala:1576)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.checkedParentType$1(Namer.scala:1590)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.$anonfun$28(Namer.scala:1686)
[error]     |    scala.collection.immutable.List.map(List.scala:250)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.completeInCreationContext(Namer.scala:1686)
[error]     |    dotty.tools.dotc.typer.Namer$Completer.complete(Namer.scala:850)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:175)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:190)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:192)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.ensureCompleted(SymDenotations.scala:393)
[error]     |    dotty.tools.dotc.typer.Namer$TypeDefCompleter.needsCompletion(Namer.scala:997)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:150)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:190)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:192)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.ensureCompleted(SymDenotations.scala:393)
[error]     |    dotty.tools.dotc.typer.Typer.typedArg$1(Typer.scala:2515)
[error]     |    dotty.tools.dotc.typer.Typer.$anonfun$53(Typer.scala:2535)
[error]     |    dotty.tools.dotc.core.Decorators$.zipWithConserve(Decorators.scala:160)
[error]     |    dotty.tools.dotc.typer.Typer.typedAppliedTypeTree(Typer.scala:2535)
[error]     |    dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:3461)
[error]     |    dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3519)
[error]     |    dotty.tools.dotc.typer.Typer.typed(Typer.scala:3596)
[error]     |    dotty.tools.dotc.typer.Typer.typed(Typer.scala:3600)
[error]     |    dotty.tools.dotc.typer.Typer.typedType(Typer.scala:3714)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.typedParentType$1(Namer.scala:1562)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.parentType$1$$anonfun$1(Namer.scala:1576)
[error]     |    dotty.tools.dotc.typer.Namer.typedAhead(Namer.scala:1737)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.parentType$1(Namer.scala:1576)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.checkedParentType$1(Namer.scala:1590)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.$anonfun$28(Namer.scala:1686)
[error]     |    scala.collection.immutable.List.map(List.scala:246)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.completeInCreationContext(Namer.scala:1686)
[error]     |    dotty.tools.dotc.typer.Namer$Completer.complete(Namer.scala:850)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:175)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:190)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:192)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.ensureCompleted(SymDenotations.scala:393)
[error]     |    dotty.tools.dotc.typer.Namer$TypeDefCompleter.needsCompletion(Namer.scala:997)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:150)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:190)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:192)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.ensureCompleted(SymDenotations.scala:393)
[error]     |    dotty.tools.dotc.typer.Typer.typedArg$1(Typer.scala:2515)
[error]     |    dotty.tools.dotc.typer.Typer.$anonfun$53(Typer.scala:2535)
[error]     |    dotty.tools.dotc.core.Decorators$.zipWithConserve(Decorators.scala:160)
[error]     |    dotty.tools.dotc.typer.Typer.typedAppliedTypeTree(Typer.scala:2535)
[error]     |    dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:3461)
[error]     |    dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3519)
[error]     |    dotty.tools.dotc.typer.Typer.typed(Typer.scala:3596)
[error]     |    dotty.tools.dotc.typer.Typer.typed(Typer.scala:3600)
[error]     |    dotty.tools.dotc.typer.Typer.typedType(Typer.scala:3714)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.typedParentType$1(Namer.scala:1562)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.parentType$1$$anonfun$1(Namer.scala:1576)
[error]     |    dotty.tools.dotc.typer.Namer.typedAhead(Namer.scala:1737)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.parentType$1(Namer.scala:1576)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.checkedParentType$1(Namer.scala:1590)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.$anonfun$28(Namer.scala:1686)
[error]     |    scala.collection.immutable.List.map(List.scala:246)
[error]     |    dotty.tools.dotc.typer.Namer$ClassCompleter.completeInCreationContext(Namer.scala:1686)
[error]     |    dotty.tools.dotc.typer.Namer$Completer.complete(Namer.scala:850)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:175)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:190)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:192)
[error]     |    dotty.tools.dotc.core.Types$NamedType.info(Types.scala:2503)
[error]     |    dotty.tools.dotc.core.Types$AppliedType.tryMatchAlias$1(Types.scala:4693)
[error]     |    dotty.tools.dotc.core.Types$AppliedType.tryNormalize(Types.scala:4709)
[error]     |    dotty.tools.dotc.core.SymDenotations$ClassDenotation.recur$4(SymDenotations.scala:2226)
[error]     |    dotty.tools.dotc.core.SymDenotations$ClassDenotation.baseTypeOf(SymDenotations.scala:2346)
[error]     |    dotty.tools.dotc.core.Types$Type.baseType(Types.scala:1226)
[error]     |    dotty.tools.dotc.core.TypeApplications$.elemType$1(TypeApplications.scala:482)
[error]     |    dotty.tools.dotc.core.TypeApplications$.translateParameterized$extension(TypeApplications.scala:483)
[error]     |    dotty.tools.dotc.core.Types$Type.annotatedToRepeated(Types.scala:2013)
[error]     |    dotty.tools.dotc.core.Types$MethodTypeCompanion.paramInfo$1(Types.scala:4266)
[error]     |    dotty.tools.dotc.core.Types$MethodTypeCompanion.fromSymbols$$anonfun$2$$anonfun$1(Types.scala:4275)
[error]     |    scala.collection.immutable.List.map(List.scala:246)
[error]     |    dotty.tools.dotc.core.Types$MethodTypeCompanion.fromSymbols$$anonfun$2(Types.scala:4275)
[error]     |    dotty.tools.dotc.core.Types$MethodType.<init>(Types.scala:4182)
[error]     |    dotty.tools.dotc.core.Types$CachedMethodType.<init>(Types.scala:4207)
[error]     |    dotty.tools.dotc.core.Types$MethodTypeCompanion.apply(Types.scala:4280)
[error]     |    dotty.tools.dotc.core.Types$MethodTypeCompanion.fromSymbols(Types.scala:4276)
[error]     |    dotty.tools.dotc.core.NamerOps$.recur$1(NamerOps.scala:88)
[error]     |    dotty.tools.dotc.core.NamerOps$.methodType(NamerOps.scala:92)
[error]     |    dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readNewDef(TreeUnpickler.scala:931)
[error]     |    dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readIndexedDef(TreeUnpickler.scala:866)
[error]     |    dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readTemplate(TreeUnpickler.scala:1126)
[error]     |    dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readNewDef(TreeUnpickler.scala:949)
[error]     |    dotty.tools.dotc.core.tasty.TreeUnpickler$TreeReader.readIndexedDef(TreeUnpickler.scala:866)
[error]     |    dotty.tools.dotc.core.tasty.TreeUnpickler$Completer.complete(TreeUnpickler.scala:166)
[error]     |    dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:175)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:190)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:192)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:190)
[error]     |    dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:192)
[error]     |    dotty.tools.dotc.core.SymDenotations$ClassDenotation.constrNamed$1(SymDenotations.scala:2396)
[error]     |    dotty.tools.dotc.core.SymDenotations$ClassDenotation.primaryConstructor(SymDenotations.scala:2399)
[error]     |    dotty.tools.dotc.ast.tpd$.New(tpd.scala:519)
[error]     |    dotty.tools.dotc.ast.TreeInfo$WitnessNamesAnnot$.apply(TreeInfo.scala:394)
[error]     |    dotty.tools.dotc.ast.desugar$.desugarContextBounds(Desugar.scala:284)
[error]     |    dotty.tools.dotc.ast.desugar$.$anonfun$3(Desugar.scala:306)
[error]     |    scala.collection.immutable.List.mapConserve(List.scala:472)
[error]     |    dotty.tools.dotc.ast.desugar$.mapParamss$$anonfun$1(Desugar.scala:207)
[error]     |    scala.collection.immutable.List.mapConserve(List.scala:472)
[error]     |    dotty.tools.dotc.ast.desugar$.mapParamss(Desugar.scala:210)
[error]     |    dotty.tools.dotc.ast.desugar$.elimContextBounds(Desugar.scala:307)
[error]     |    dotty.tools.dotc.ast.desugar$.defDef(Desugar.scala:227)
[error]     |    dotty.tools.dotc.ast.desugar$.classDef(Desugar.scala:559)
[error]     |    dotty.tools.dotc.ast.desugar$.defTree(Desugar.scala:1475)
[error]     |    dotty.tools.dotc.typer.Namer.expand(Namer.scala:354)
[error]     |    dotty.tools.dotc.typer.Namer.expandTopLevel$1(Namer.scala:724)
[error]     |    dotty.tools.dotc.typer.Namer.index(Namer.scala:728)
[error]     |    dotty.tools.dotc.typer.Namer.recur$1(Namer.scala:398)
[error]     |    dotty.tools.dotc.typer.Namer.indexExpanded(Namer.scala:421)
[error]     |    dotty.tools.dotc.typer.Namer.$anonfun$12(Namer.scala:730)
[error]     |    scala.collection.LinearSeqOps.foldLeft(LinearSeq.scala:183)
[error]     |    scala.collection.LinearSeqOps.foldLeft$(LinearSeq.scala:179)
[error]     |    scala.collection.immutable.List.foldLeft(List.scala:79)
[error]     |    dotty.tools.dotc.typer.Namer.index(Namer.scala:730)
[error]     |    dotty.tools.dotc.typer.Namer.recur$1(Namer.scala:398)
[error]     |    dotty.tools.dotc.typer.Namer.indexExpanded(Namer.scala:421)
[error]     |    dotty.tools.dotc.typer.Namer.$anonfun$12(Namer.scala:730)
[error]     |    scala.collection.LinearSeqOps.foldLeft(LinearSeq.scala:183)
[error]     |    scala.collection.LinearSeqOps.foldLeft$(LinearSeq.scala:179)
[error]     |    scala.collection.immutable.List.foldLeft(List.scala:79)
[error]     |    dotty.tools.dotc.typer.Namer.index(Namer.scala:730)
[error]     |    dotty.tools.dotc.typer.Namer.recur$1(Namer.scala:398)
[error]     |    dotty.tools.dotc.typer.Namer.indexExpanded(Namer.scala:421)
[error]     |    dotty.tools.dotc.typer.Namer.index(Namer.scala:388)
[error]     |    dotty.tools.dotc.typer.TyperPhase.enterSyms$$anonfun$1(TyperPhase.scala:39)
[error]     |    scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error]     |    scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error]     |    dotty.tools.dotc.core.Phases$Phase.monitor(Phases.scala:503)
[error]     |    dotty.tools.dotc.typer.TyperPhase.enterSyms(TyperPhase.scala:41)
[error]     |    dotty.tools.dotc.typer.TyperPhase.$anonfun$2(TyperPhase.scala:82)
[error]     |    scala.collection.Iterator$$anon$6.hasNext(Iterator.scala:479)
[error]     |    scala.collection.Iterator$$anon$9.hasNext(Iterator.scala:583)
[error]     |    scala.collection.immutable.List.prependedAll(List.scala:155)
[error]     |    scala.collection.immutable.List$.from(List.scala:684)
[error]     |    scala.collection.immutable.List$.from(List.scala:681)
[error]     |    scala.collection.IterableOps$WithFilter.map(Iterable.scala:898)
[error]     |    dotty.tools.dotc.typer.TyperPhase.runOn(TyperPhase.scala:83)
[error]     |    dotty.tools.dotc.Run.runPhases$1$$anonfun$1(Run.scala:343)
[error]     |    scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error]     |    scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error]     |    scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1323)
[error]     |    dotty.tools.dotc.Run.runPhases$1(Run.scala:369)
[error]     |    dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:384)
[error]     |    dotty.tools.dotc.Run.compileUnits$$anonfun$adapted$1(Run.scala:396)
[error]     |    dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:69)
[error]     |    dotty.tools.dotc.Run.compileUnits(Run.scala:396)
[error]     |    dotty.tools.dotc.Run.compileSources(Run.scala:282)
[error]     |    dotty.tools.dotc.Run.compile(Run.scala:267)
[error]     |    dotty.tools.dotc.Driver.doCompile(Driver.scala:37)
[error]     |    dotty.tools.xsbt.CompilerBridgeDriver.run(CompilerBridgeDriver.java:141)
[error]     |    dotty.tools.xsbt.CompilerBridge.run(CompilerBridge.java:22)
[error]     |    sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:91)
[error]     |    sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$7(MixedAnalyzingCompiler.scala:193)
[error]     |    scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
[error]     |    sbt.internal.inc.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:248)
[error]     |    sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4(MixedAnalyzingCompiler.scala:183)
[error]     |    sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4$adapted(MixedAnalyzingCompiler.scala:163)
[error]     |    sbt.internal.inc.JarUtils$.withPreviousJar(JarUtils.scala:239)
[error]     |    sbt.internal.inc.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:163)
[error]     |    sbt.internal.inc.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:211)
[error]     |    sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1(IncrementalCompilerImpl.scala:534)
[error]     |    sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1$adapted(IncrementalCompilerImpl.scala:534)
[error]     |    sbt.internal.inc.Incremental$.$anonfun$apply$5(Incremental.scala:180)
[error]     |    sbt.internal.inc.Incremental$.$anonfun$apply$5$adapted(Incremental.scala:178)
[error]     |    sbt.internal.inc.Incremental$$anon$2.run(Incremental.scala:464)
[error]     |    sbt.internal.inc.IncrementalCommon$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$8(Incremental.scala:419)
[error]     |    sbt.internal.inc.Incremental$.withClassfileManager(Incremental.scala:506)
[error]     |    sbt.internal.inc.Incremental$.incrementalCompile(Incremental.scala:406)
[error]     |    sbt.internal.inc.Incremental$.apply(Incremental.scala:172)
[error]     |    sbt.internal.inc.IncrementalCompilerImpl.compileInternal(IncrementalCompilerImpl.scala:534)
[error]     |    sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileIncrementally$1(IncrementalCompilerImpl.scala:488)
[error]     |    sbt.internal.inc.IncrementalCompilerImpl.handleCompilationError(IncrementalCompilerImpl.scala:332)
[error]     |    sbt.internal.inc.IncrementalCompilerImpl.compileIncrementally(IncrementalCompilerImpl.scala:425)
[error]     |    sbt.internal.inc.IncrementalCompilerImpl.compile(IncrementalCompilerImpl.scala:137)
[error]     |    sbt.Defaults$.compileIncrementalTaskImpl(Defaults.scala:2371)
[error]     |    sbt.Defaults$.$anonfun$compileIncrementalTask$2(Defaults.scala:2321)
[error]     |    sbt.internal.server.BspCompileTask$.$anonfun$compute$1(BspCompileTask.scala:31)
[error]     |    sbt.internal.io.Retry$.apply(Retry.scala:47)
[error]     |    sbt.internal.io.Retry$.apply(Retry.scala:29)
[error]     |    sbt.internal.io.Retry$.apply(Retry.scala:24)
[error]     |    sbt.internal.server.BspCompileTask$.compute(BspCompileTask.scala:31)
[error]     |    sbt.Defaults$.$anonfun$compileIncrementalTask$1(Defaults.scala:2319)
[error]     |    scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error]     |    sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:63)
[error]     |    sbt.std.Transform$$anon$4.work(Transform.scala:69)
[error]     |    sbt.Execute.$anonfun$submit$2(Execute.scala:283)
[error]     |    sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:24)
[error]     |    sbt.Execute.work(Execute.scala:292)
[error]     |    sbt.Execute.$anonfun$submit$1(Execute.scala:283)
[error]     |    sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error]     |    sbt.CompletionService$$anon$2.call(CompletionService.scala:65)
[error]     |    java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error]     |    java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
[error]     |    java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error]     |    java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
[error]     |    java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
[error]     |    java.base/java.lang.Thread.run(Thread.java:829)

Crash:

[error] ## Exception when compiling 568 sources to /home/e45lee/scala-base/out/bootstrap/scala2-library-modularity/scala-3.5.1-RC1-bin-SNAPSHOT-nonbootstrapped/classes
[error] java.util.NoSuchElementException: None.get
[error] scala.None$.get(Option.scala:627)
[error] scala.None$.get(Option.scala:626)
[error] dotty.tools.dotc.typer.Typer.localTyper(Typer.scala:3387)
[error] dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:3415)
[error] dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3518)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:3596)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:3600)
[error] dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:3622)
[error] dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:3668)
[error] dotty.tools.dotc.typer.Typer.typedClassDef(Typer.scala:3116)
[error] dotty.tools.dotc.typer.Typer.typedTypeOrClassDef$1(Typer.scala:3422)
[error] dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:3426)
[error] dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3518)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:3596)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:3600)
[error] dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:3622)
[error] dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:3668)
[error] dotty.tools.dotc.typer.Typer.typedPackageDef(Typer.scala:3249)
[error] dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:3468)
[error] dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3519)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:3596)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:3600)
[error] dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:3649)
[error] dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:3668)
[error] dotty.tools.dotc.typer.Typer.typedPackageDef(Typer.scala:3249)
[error] dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:3468)
[error] dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:3519)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:3596)
[error] dotty.tools.dotc.typer.Typer.typed(Typer.scala:3600)
[error] dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:3711)
[error] dotty.tools.dotc.typer.TyperPhase.typeCheck$$anonfun$1(TyperPhase.scala:47)
[error] scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error] scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error] dotty.tools.dotc.core.Phases$Phase.monitor(Phases.scala:503)
[error] dotty.tools.dotc.typer.TyperPhase.typeCheck(TyperPhase.scala:53)
[error] dotty.tools.dotc.typer.TyperPhase.$anonfun$4(TyperPhase.scala:99)
[error] scala.collection.Iterator$$anon$6.hasNext(Iterator.scala:479)
[error] scala.collection.Iterator$$anon$9.hasNext(Iterator.scala:583)
[error] scala.collection.immutable.List.prependedAll(List.scala:155)
[error] scala.collection.immutable.List$.from(List.scala:684)
[error] scala.collection.immutable.List$.from(List.scala:681)
[error] scala.collection.IterableOps$WithFilter.map(Iterable.scala:898)
[error] dotty.tools.dotc.typer.TyperPhase.runOn(TyperPhase.scala:100)
[error] dotty.tools.dotc.Run.runPhases$1$$anonfun$1(Run.scala:343)
[error] scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error] scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error] scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1323)
[error] dotty.tools.dotc.Run.runPhases$1(Run.scala:369)
[error] dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:384)
[error] dotty.tools.dotc.Run.compileUnits$$anonfun$adapted$1(Run.scala:396)
[error] dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:69)
[error] dotty.tools.dotc.Run.compileUnits(Run.scala:396)
[error] dotty.tools.dotc.Run.compileSources(Run.scala:282)
[error] dotty.tools.dotc.Run.compile(Run.scala:267)
[error] dotty.tools.dotc.Driver.doCompile(Driver.scala:37)
[error] dotty.tools.xsbt.CompilerBridgeDriver.run(CompilerBridgeDriver.java:141)
[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$7(MixedAnalyzingCompiler.scala:193)
[error] scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
[error] sbt.internal.inc.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:248)
[error] sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4(MixedAnalyzingCompiler.scala:183)
[error] sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4$adapted(MixedAnalyzingCompiler.scala:163)
[error] sbt.internal.inc.JarUtils$.withPreviousJar(JarUtils.scala:239)
[error] sbt.internal.inc.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:163)
[error] sbt.internal.inc.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:211)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1(IncrementalCompilerImpl.scala:534)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1$adapted(IncrementalCompilerImpl.scala:534)
[error] sbt.internal.inc.Incremental$.$anonfun$apply$5(Incremental.scala:180)
[error] sbt.internal.inc.Incremental$.$anonfun$apply$5$adapted(Incremental.scala:178)
[error] sbt.internal.inc.Incremental$$anon$2.run(Incremental.scala:464)
[error] sbt.internal.inc.IncrementalCommon$CycleState.next(IncrementalCommon.scala:116)
[error] sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:56)
[error] sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:52)
[error] sbt.internal.inc.IncrementalCommon.cycle(IncrementalCommon.scala:263)
[error] sbt.internal.inc.Incremental$.$anonfun$incrementalCompile$8(Incremental.scala:419)
[error] sbt.internal.inc.Incremental$.withClassfileManager(Incremental.scala:506)
[error] sbt.internal.inc.Incremental$.incrementalCompile(Incremental.scala:406)
[error] sbt.internal.inc.Incremental$.apply(Incremental.scala:172)
[error] sbt.internal.inc.IncrementalCompilerImpl.compileInternal(IncrementalCompilerImpl.scala:534)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileIncrementally$1(IncrementalCompilerImpl.scala:488)
[error] sbt.internal.inc.IncrementalCompilerImpl.handleCompilationError(IncrementalCompilerImpl.scala:332)
[error] sbt.internal.inc.IncrementalCompilerImpl.compileIncrementally(IncrementalCompilerImpl.scala:425)
[error] sbt.internal.inc.IncrementalCompilerImpl.compile(IncrementalCompilerImpl.scala:137)
[error] sbt.Defaults$.compileIncrementalTaskImpl(Defaults.scala:2371)
[error] sbt.Defaults$.$anonfun$compileIncrementalTask$2(Defaults.scala:2321)
[error] sbt.internal.server.BspCompileTask$.$anonfun$compute$1(BspCompileTask.scala:31)
[error] sbt.internal.io.Retry$.apply(Retry.scala:47)
[error] sbt.internal.io.Retry$.apply(Retry.scala:29)
[error] sbt.internal.io.Retry$.apply(Retry.scala:24)
[error] sbt.internal.server.BspCompileTask$.compute(BspCompileTask.scala:31)
[error] sbt.Defaults$.$anonfun$compileIncrementalTask$1(Defaults.scala:2319)
[error] scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error] sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:63)
[error] sbt.std.Transform$$anon$4.work(Transform.scala:69)
[error] sbt.Execute.$anonfun$submit$2(Execute.scala:283)
[error] sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:24)
[error] sbt.Execute.work(Execute.scala:292)
[error] sbt.Execute.$anonfun$submit$1(Execute.scala:283)
[error] sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error] sbt.CompletionService$$anon$2.call(CompletionService.scala:65)
[error] java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
[error] java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
[error] java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
[error] java.base/java.lang.Thread.run(Thread.java:829)

Expectation

No crash, and no unpicker error.
@e45lee e45lee added itype:bug stat:needs triage Every issue needs to have an "area" and "itype" label labels Jun 20, 2024
@Gedochao Gedochao added itype:crash stat:needs minimization Needs a self contained minimization area:pickling and removed stat:needs triage Every issue needs to have an "area" and "itype" label labels Jun 25, 2024
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@e45lee @Gedochao