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Pickler regression in valerylobachev/data-dictionary-builder - crashes on tuple extraction (again) #24456

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#24490
Open
Pickler regression in valerylobachev/data-dictionary-builder - crashes on tuple extraction (again)#24456
#24490
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area:picklingitype:bugregressionThis worked in a previous version but doesn't anymore
@WojciechMazur

Description

@WojciechMazur
WojciechMazur
opened on Nov 17, 2025

Based on the OpenCB failure in valerylobachev/data-dictionary-builder

Same as #24207 - the only difference is usage of unused named term, instead of wildcard to ignore the result

Compiler version

3.8.0-RC1
3.8.1-nightly

Minimized code

class Generator:
  private def generateTable(table: Table) = 
    val (ownRelations, unusedTerm) = calculateOwnRelations(table)
    None

  private def calculateOwnRelations(table: Table) =
    val ownRelations = table.relations.filter(_.association.isDefined)
    (ownRelations, Nil)

case class Table(relations: Seq[TableRelation])
case class TableRelation(association: Option[Association])
trait Association

Output

Error compiling project (Scala 3.8.1-RC1-bin-20251116-532f2a7-NIGHTLY, JVM (21))
Error: java.lang.AssertionError: assertion failed: orphan parameter reference: TermParamRef(table)
        at scala.runtime.Scala3RunTime$.assertFailed(Scala3RunTime.scala:10)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleNewType(TreePickler.scala:318)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleType(TreePickler.scala:183)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleExternalRef$1(TreePickler.scala:224)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleNewType(TreePickler.scala:245)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleType(TreePickler.scala:183)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:454)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:726)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$21(TreePickler.scala:741)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:741)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTpt(TreePickler.scala:352)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$4(TreePickler.scala:534)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:534)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:519)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleNewType(TreePickler.scala:286)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleType(TreePickler.scala:183)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleNewType$$anonfun$2(TreePickler.scala:204)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleNewType(TreePickler.scala:204)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleType(TreePickler.scala:183)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:629)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:599)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$7(TreePickler.scala:595)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:595)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTreeUnlessEmpty(TreePickler.scala:356)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleDef(TreePickler.scala:390)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:648)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$6(TreePickler.scala:571)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:571)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTreeUnlessEmpty(TreePickler.scala:356)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleDef(TreePickler.scala:390)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:663)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleStats$$anonfun$2(TreePickler.scala:423)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleStats(TreePickler.scala:423)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:699)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleDef(TreePickler.scala:381)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:665)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleStats$$anonfun$2(TreePickler.scala:423)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleStats(TreePickler.scala:423)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:715)
        at dotty.tools.dotc.core.tasty.TreePickler.pickle$$anonfun$1(TreePickler.scala:943)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickle(TreePickler.scala:941)
        at dotty.tools.dotc.transform.Pickler.run$$anonfun$1$$anonfun$1(Pickler.scala:306)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.transform.Pickler.run$$anonfun$1(Pickler.scala:279)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.transform.Pickler.run(Pickler.scala:278)
        at dotty.tools.dotc.core.Phases$Phase.runOn$$anonfun$1(Phases.scala:406)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.Phases$Phase.runOn(Phases.scala:399)
        at dotty.tools.dotc.transform.Pickler.runPhase$1(Pickler.scala:392)
        at dotty.tools.dotc.transform.Pickler.runOn(Pickler.scala:398)
        at dotty.tools.dotc.Run.runPhases$1$$anonfun$1(Run.scala:380)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1327)
        at dotty.tools.dotc.Run.runPhases$1(Run.scala:373)
        at dotty.tools.dotc.Run.compileUnits$$anonfun$1$$anonfun$2(Run.scala:420)
        at dotty.tools.dotc.Run.compileUnits$$anonfun$1$$anonfun$adapted$1(Run.scala:420)
        at scala.Function0.apply$mcV$sp(Function0.scala:45)
        at dotty.tools.dotc.Run.showProgress(Run.scala:482)
        at dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:420)
        at dotty.tools.dotc.Run.compileUnits$$anonfun$adapted$1(Run.scala:432)
        at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:69)
        at dotty.tools.dotc.Run.compileUnits(Run.scala:432)
        at dotty.tools.dotc.Run.compileSources(Run.scala:319)
        at dotty.tools.dotc.Run.compile(Run.scala:304)
        at dotty.tools.dotc.Driver.doCompile(Driver.scala:38)
        at dotty.tools.xsbt.CompilerBridgeDriver.run(CompilerBridgeDriver.java:141)
        at dotty.tools.xsbt.CompilerBridge.run(CompilerBridge.java:22)
        at sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:91)
        at sbt.internal.inc.bloop.internal.BloopHighLevelCompiler.compileSources$1(BloopHighLevelCompiler.scala:148)
        at sbt.internal.inc.bloop.internal.BloopHighLevelCompiler.$anonfun$compile$9(BloopHighLevelCompiler.scala:181)
        at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at sbt.internal.inc.bloop.internal.BloopHighLevelCompiler.$anonfun$compile$1(BloopHighLevelCompiler.scala:73)
        at bloop.tracing.NoopTracer$.trace(BraveTracer.scala:53)
        at sbt.internal.inc.bloop.internal.BloopHighLevelCompiler.timed$1(BloopHighLevelCompiler.scala:72)
        at sbt.internal.inc.bloop.internal.BloopHighLevelCompiler.$anonfun$compile$8(BloopHighLevelCompiler.scala:181)
        at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at monix.eval.internal.TaskRunLoop$.startFull(TaskRunLoop.scala:81)
        at monix.eval.internal.TaskRestartCallback.syncOnSuccess(TaskRestartCallback.scala:101)
        at monix.eval.internal.TaskRestartCallback.onSuccess(TaskRestartCallback.scala:74)
        at monix.eval.internal.TaskExecuteOn$AsyncRegister$$anon$1.run(TaskExecuteOn.scala:71)
        at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1423)
        at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:387)
        at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1312)
        at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1843)
        at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1808)
        at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:188)

Error: Unexpected error when compiling community-build3_b216afcc64-9d23cdd7be: java.lang.AssertionError: assertion failed: orphan parameter reference: TermParamRef(table)
        at scala.runtime.Scala3RunTime$.assertFailed(Scala3RunTime.scala:10)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleNewType(TreePickler.scala:318)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleType(TreePickler.scala:183)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleExternalRef$1(TreePickler.scala:224)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleNewType(TreePickler.scala:245)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleType(TreePickler.scala:183)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:454)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:726)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$21(TreePickler.scala:741)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:741)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTpt(TreePickler.scala:352)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$4(TreePickler.scala:534)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:534)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:519)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleNewType(TreePickler.scala:286)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleType(TreePickler.scala:183)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleNewType$$anonfun$2(TreePickler.scala:204)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleNewType(TreePickler.scala:204)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleType(TreePickler.scala:183)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:629)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:599)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$7(TreePickler.scala:595)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:595)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTreeUnlessEmpty(TreePickler.scala:356)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleDef(TreePickler.scala:390)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:648)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree$$anonfun$6(TreePickler.scala:571)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:571)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTreeUnlessEmpty(TreePickler.scala:356)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleDef(TreePickler.scala:390)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:663)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleStats$$anonfun$2(TreePickler.scala:423)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleStats(TreePickler.scala:423)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:699)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleDef(TreePickler.scala:381)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:665)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleStats$$anonfun$2(TreePickler.scala:423)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleStats(TreePickler.scala:423)
        at dotty.tools.dotc.core.tasty.TreePickler.pickleTree(TreePickler.scala:715)
        at dotty.tools.dotc.core.tasty.TreePickler.pickle$$anonfun$1(TreePickler.scala:943)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.tasty.TreePickler.pickle(TreePickler.scala:941)
        at dotty.tools.dotc.transform.Pickler.run$$anonfun$1$$anonfun$1(Pickler.scala:306)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.transform.Pickler.run$$anonfun$1(Pickler.scala:279)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.transform.Pickler.run(Pickler.scala:278)
        at dotty.tools.dotc.core.Phases$Phase.runOn$$anonfun$1(Phases.scala:406)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:327)
        at dotty.tools.dotc.core.Phases$Phase.runOn(Phases.scala:399)
        at dotty.tools.dotc.transform.Pickler.runPhase$1(Pickler.scala:392)
        at dotty.tools.dotc.transform.Pickler.runOn(Pickler.scala:398)
        at dotty.tools.dotc.Run.runPhases$1$$anonfun$1(Run.scala:380)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1327)
        at dotty.tools.dotc.Run.runPhases$1(Run.scala:373)
        at dotty.tools.dotc.Run.compileUnits$$anonfun$1$$anonfun$2(Run.scala:420)
        at dotty.tools.dotc.Run.compileUnits$$anonfun$1$$anonfun$adapted$1(Run.scala:420)
        at scala.Function0.apply$mcV$sp(Function0.scala:45)
        at dotty.tools.dotc.Run.showProgress(Run.scala:482)
        at dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:420)
        at dotty.tools.dotc.Run.compileUnits$$anonfun$adapted$1(Run.scala:432)
        at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:69)
        at dotty.tools.dotc.Run.compileUnits(Run.scala:432)
        at dotty.tools.dotc.Run.compileSources(Run.scala:319)
        at dotty.tools.dotc.Run.compile(Run.scala:304)
        at dotty.tools.dotc.Driver.doCompile(Driver.scala:38)
        at dotty.tools.xsbt.CompilerBridgeDriver.run(CompilerBridgeDriver.java:141)
        at dotty.tools.xsbt.CompilerBridge.run(CompilerBridge.java:22)
        at sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:91)
        at sbt.internal.inc.bloop.internal.BloopHighLevelCompiler.compileSources$1(BloopHighLevelCompiler.scala:148)
        at sbt.internal.inc.bloop.internal.BloopHighLevelCompiler.$anonfun$compile$9(BloopHighLevelCompiler.scala:181)
        at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at sbt.internal.inc.bloop.internal.BloopHighLevelCompiler.$anonfun$compile$1(BloopHighLevelCompiler.scala:73)
        at bloop.tracing.NoopTracer$.trace(BraveTracer.scala:53)
        at sbt.internal.inc.bloop.internal.BloopHighLevelCompiler.timed$1(BloopHighLevelCompiler.scala:72)
        at sbt.internal.inc.bloop.internal.BloopHighLevelCompiler.$anonfun$compile$8(BloopHighLevelCompiler.scala:181)
        at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at monix.eval.internal.TaskRunLoop$.startFull(TaskRunLoop.scala:81)
        at monix.eval.internal.TaskRestartCallback.syncOnSuccess(TaskRestartCallback.scala:101)
        at monix.eval.internal.TaskRestartCallback.onSuccess(TaskRestartCallback.scala:74)
        at monix.eval.internal.TaskExecuteOn$AsyncRegister$$anon$1.run(TaskExecuteOn.scala:71)
        at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1423)
        at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:387)
        at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1312)
        at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1843)
        at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1808)
        at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:188)

Compilation failed

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