[Bug][Scala 3.2] Autocomplete on Array.x produces Bad symbolic reference.

[HamishPoole]

me@pop-os:~$ amm
Loading...
Welcome to the Ammonite Repl 2.5.5 (Scala 3.2.0 Java 11.0.16.1)
@ val a = Array.tabulate(5)(_ + 1)
a: Array[Int] = Array(1, 2, 3, 4, 5)

@ val b = Array.tabjava.lang.AssertionError: assertion failed: missing implicit parameter of type scala.reflect.ClassTag[A] after typer at phase parser
  scala.runtime.Scala3RunTime$.assertFailed(Scala3RunTime.scala:8)
  dotty.tools.dotc.typer.Implicits.inferImplicit(Implicits.scala:995)
  dotty.tools.dotc.typer.Implicits.inferImplicit$(Implicits.scala:797)
  dotty.tools.dotc.typer.Typer.inferImplicit(Typer.scala:117)
  dotty.tools.dotc.typer.Implicits.inferImplicitArg(Implicits.scala:863)
  dotty.tools.dotc.typer.Implicits.inferImplicitArg$(Implicits.scala:797)
  dotty.tools.dotc.typer.Typer.inferImplicitArg(Typer.scala:117)
  dotty.tools.dotc.typer.Typer.implicitArgs$1(Typer.scala:3490)
  dotty.tools.dotc.typer.Typer.addImplicitArgs$1(Typer.scala:3526)
  dotty.tools.dotc.typer.Typer.adaptNoArgsImplicitMethod$1(Typer.scala:3602)
  dotty.tools.dotc.typer.Typer.adaptNoArgs$1(Typer.scala:3800)
  dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:4038)
  dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3368)
  dotty.tools.dotc.typer.Typer.typed(Typer.scala:2987)
  dotty.tools.dotc.typer.Implicits.tryConversion$1(Implicits.scala:1089)
  dotty.tools.dotc.typer.Implicits.typedImplicit(Implicits.scala:1120)
  dotty.tools.dotc.typer.Implicits.typedImplicit$(Implicits.scala:797)
  dotty.tools.dotc.typer.Typer.typedImplicit(Typer.scala:117)
  dotty.tools.dotc.typer.Implicits$ImplicitSearch.tryImplicit(Implicits.scala:1190)
  dotty.tools.dotc.typer.Implicits$ImplicitSearch.$anonfun$9(Implicits.scala:1528)
  scala.collection.immutable.List.map(List.scala:246)
  dotty.tools.dotc.typer.Implicits$ImplicitSearch.allImplicits(Implicits.scala:1528)
  dotty.tools.dotc.interactive.Completion$Completer.implicitConversionTargets(Completion.scala:521)
  dotty.tools.dotc.interactive.Completion$Completer.implicitConversionMemberCompletions(Completion.scala:386)
  dotty.tools.dotc.interactive.Completion$Completer.selectionCompletions(Completion.scala:328)
  dotty.ammonite.compiler.AmmCompletion$.computeCompletions(AmmCompletion.scala:45)
  dotty.ammonite.compiler.AmmCompletion$.completions(AmmCompletion.scala:27)
  ammonite.compiler.Compiler.complete(Compiler.scala:385)
  ammonite.compiler.CompilerLifecycleManager.complete(CompilerLifecycleManager.scala:111)
  ammonite.repl.Repl.$anonfun$action$5(Repl.scala:192)
  ammonite.repl.Repl.$anonfun$action$5$adapted(Repl.scala:192)
  ammonite.repl.AmmoniteFrontEnd.$anonfun$readLine$3(AmmoniteFrontEnd.scala:53)
  ammonite.terminal.TTY$.withSttyOverride(Utils.scala:117)
  ammonite.repl.AmmoniteFrontEnd.$anonfun$readLine$1(AmmoniteFrontEnd.scala:53)
  ammonite.terminal.Filter$$anon$2$$anonfun$op$6.applyOrElse(Filter.scala:69)
  ammonite.terminal.Filter$$anon$2$$anonfun$op$6.applyOrElse(Filter.scala:69)
  scala.collection.IterableOnceOps.collectFirst(IterableOnce.scala:1116)
  scala.collection.IterableOnceOps.collectFirst$(IterableOnce.scala:1108)
  scala.collection.AbstractIterator.collectFirst(Iterator.scala:1300)
  ammonite.terminal.Filter$$anon$2.op(Filter.scala:69)
  ammonite.terminal.Filter$$anon$5.$anonfun$op$7(Filter.scala:93)
  scala.collection.Iterator$$anon$9.next(Iterator.scala:584)
  scala.collection.IterableOnceOps.find(IterableOnce.scala:633)
  scala.collection.IterableOnceOps.find$(IterableOnce.scala:630)
  scala.collection.AbstractIterator.find(Iterator.scala:1300)
  ammonite.terminal.Filter$$anon$5.op(Filter.scala:93)
  ammonite.terminal.LineReader.readChar(LineReader.scala:157)
  ammonite.terminal.Terminal$.$anonfun$readLine$2(Terminal.scala:41)
  ammonite.terminal.TTY$.withSttyOverride(Utils.scala:117)
  ammonite.terminal.Terminal$.readLine(Terminal.scala:41)
  ammonite.repl.AmmoniteFrontEnd.readLine(AmmoniteFrontEnd.scala:133)
  ammonite.repl.AmmoniteFrontEnd.action(AmmoniteFrontEnd.scala:28)
  ammonite.repl.Repl.$anonfun$action$4(Repl.scala:194)
  ammonite.repl.Scoped.$anonfun$flatMap$1(Signaller.scala:45)
  ammonite.repl.Signaller.apply(Signaller.scala:28)
  ammonite.repl.Scoped.flatMap(Signaller.scala:45)
  ammonite.repl.Scoped.flatMap$(Signaller.scala:45)
  ammonite.repl.Signaller.flatMap(Signaller.scala:16)
  ammonite.repl.Repl.$anonfun$action$2(Repl.scala:178)
  ammonite.util.Catching.flatMap(Res.scala:115)
  ammonite.repl.Repl.action(Repl.scala:170)
  ammonite.repl.Repl.loop$1(Repl.scala:212)
  ammonite.repl.Repl.run(Repl.scala:227)
  ammonite.Main.$anonfun$run$1(Main.scala:236)
  scala.Option.getOrElse(Option.scala:201)
  ammonite.Main.run(Main.scala:224)
  ammonite.MainRunner.$anonfun$runRepl$1(MainRunner.scala:72)
  ammonite.MainRunner.watchLoop(MainRunner.scala:53)
  ammonite.MainRunner.runRepl(MainRunner.scala:72)
  ammonite.AmmoniteMain$.main0(AmmoniteMain.scala:99)
  ammonite.AmmoniteMain$.main(AmmoniteMain.scala:38)
  ammonite.AmmoniteMain.main(AmmoniteMain.scala)


@ val c = Array.tabulate(9)(_ + 1)
Bad symbolic reference. A signature
refers to JFunction1$mcII$sp/T in package scala.runtime.java8 which is not available.
It may be completely missing from the current classpath, or the version on
the classpath might be incompatible with the version used when compiling the signature.
Compilation Failed

See above. Using tab autocompletion on the Array produces a bad symbolic reference later.

Using https://github.com/com-lihaoyi/Ammonite/releases/download/2.5.5/3.2-2.5.5

[crater2150]

A similar error also occurs in Scala's own repl, also related to completion: scala/scala3#15562

[felix-alonso]

I also experienced a similar error. I was test driving the REPL and wrote this:

"hello world".toSeq.map(_.to<TAB>

And got the following stack trace:

stack trace

Exception in thread "main" java.lang.AssertionError: assertion failed: missing implicit parameter of type Ordering[scala.runtime.RichChar] after typer at phase parser
	at scala.runtime.Scala3RunTime$.assertFailed(Scala3RunTime.scala:8)
	at dotty.tools.dotc.typer.Implicits.inferImplicit(Implicits.scala:1042)
	at dotty.tools.dotc.typer.Implicits.inferImplicit$(Implicits.scala:818)
	at dotty.tools.dotc.typer.Typer.inferImplicit(Typer.scala:116)
	at dotty.tools.dotc.typer.Implicits.inferImplicitArg(Implicits.scala:884)
	at dotty.tools.dotc.typer.Implicits.inferImplicitArg$(Implicits.scala:818)
	at dotty.tools.dotc.typer.Typer.inferImplicitArg(Typer.scala:116)
	at dotty.tools.dotc.typer.Typer.implicitArgs$1(Typer.scala:3737)
	at dotty.tools.dotc.typer.Typer.addImplicitArgs$1(Typer.scala:3773)
	at dotty.tools.dotc.typer.Typer.adaptNoArgsImplicitMethod$1(Typer.scala:3849)
	at dotty.tools.dotc.typer.Typer.adaptNoArgs$1(Typer.scala:4038)
	at dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:4268)
	at dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3587)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:3184)
	at dotty.tools.dotc.typer.Implicits.tryConversion$1(Implicits.scala:1136)
	at dotty.tools.dotc.typer.Implicits.typedImplicit(Implicits.scala:1167)
	at dotty.tools.dotc.typer.Implicits.typedImplicit$(Implicits.scala:818)
	at dotty.tools.dotc.typer.Typer.typedImplicit(Typer.scala:116)
	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.tryImplicit(Implicits.scala:1242)
	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.$anonfun$6(Implicits.scala:1580)
	at scala.collection.immutable.List.map(List.scala:246)
	at dotty.tools.dotc.typer.Implicits$ImplicitSearch.allImplicits(Implicits.scala:1580)
	at dotty.tools.dotc.interactive.Completion$Completer.implicitConversionTargets(Completion.scala:515)
	at dotty.tools.dotc.interactive.Completion$Completer.implicitConversionMemberCompletions(Completion.scala:380)
	at dotty.tools.dotc.interactive.Completion$Completer.selectionCompletions(Completion.scala:322)
	at dotty.ammonite.compiler.AmmCompletion$.computeCompletions(AmmCompletion.scala:45)
	at dotty.ammonite.compiler.AmmCompletion$.completions(AmmCompletion.scala:27)
	at ammonite.compiler.Compiler.complete(Compiler.scala:392)
	at ammonite.compiler.CompilerLifecycleManager.complete(CompilerLifecycleManager.scala:115)
	at ammonite.repl.Repl.action$$anonfun$2$$anonfun$2$$anonfun$1(Repl.scala:199)
	at ammonite.repl.Repl.action$$anonfun$2$$anonfun$2$$anonfun$adapted$1(Repl.scala:199)
	at ammonite.repl.AmmoniteFrontEnd.$anonfun$3(AmmoniteFrontEnd.scala:53)
	at ammonite.terminal.TTY$.withSttyOverride(Utils.scala:117)
	at ammonite.repl.AmmoniteFrontEnd.$anonfun$1(AmmoniteFrontEnd.scala:54)
	at ammonite.terminal.Filter$$anon$3$$anon$4.applyOrElse(Filter.scala:69)
	at ammonite.terminal.Filter$$anon$3$$anon$4.applyOrElse(Filter.scala:69)
	at scala.collection.IterableOnceOps.collectFirst(IterableOnce.scala:1142)
	at scala.collection.IterableOnceOps.collectFirst$(IterableOnce.scala:1134)
	at scala.collection.AbstractIterator.collectFirst(Iterator.scala:1300)
	at ammonite.terminal.Filter$$anon$3.op(Filter.scala:69)
	at ammonite.terminal.Filter$.ammonite$terminal$Filter$$anon$7$$_$op$$anonfun$3(Filter.scala:93)
	at scala.collection.Iterator$$anon$9.next(Iterator.scala:584)
	at scala.collection.IterableOnceOps.find(IterableOnce.scala:634)
	at scala.collection.IterableOnceOps.find$(IterableOnce.scala:631)
	at scala.collection.AbstractIterator.find(Iterator.scala:1300)
	at ammonite.terminal.Filter$$anon$7.op(Filter.scala:93)
	at ammonite.terminal.LineReader.readChar(LineReader.scala:157)
	at ammonite.terminal.Terminal$.readLine$$anonfun$2(Terminal.scala:40)
	at ammonite.terminal.TTY$.withSttyOverride(Utils.scala:117)
	at ammonite.terminal.Terminal$.readLine(Terminal.scala:42)
	at ammonite.repl.AmmoniteFrontEnd.readLine(AmmoniteFrontEnd.scala:152)
	at ammonite.repl.AmmoniteFrontEnd.action(AmmoniteFrontEnd.scala:28)
	at ammonite.repl.Repl.action$$anonfun$2$$anonfun$2(Repl.scala:204)
	at ammonite.repl.Scoped.flatMap$$anonfun$1(Signaller.scala:45)
	at ammonite.repl.Signaller.apply(Signaller.scala:28)
	at ammonite.repl.Scoped.flatMap(Signaller.scala:45)
	at ammonite.repl.Scoped.flatMap$(Signaller.scala:42)
	at ammonite.repl.Signaller.flatMap(Signaller.scala:16)
	at ammonite.repl.Repl.action$$anonfun$2(Repl.scala:210)
	at ammonite.util.Res$Success.flatMap(Res.scala:62)
	at ammonite.repl.Repl.action(Repl.scala:210)
	at ammonite.repl.Repl.loop$1(Repl.scala:219)
	at ammonite.repl.Repl.run(Repl.scala:234)
	at ammonite.Main.run(Main.scala:248)
	at ammonite.MainRunner.runRepl$$anonfun$1(MainRunner.scala:72)
	at ammonite.MainRunner.watchLoop(MainRunner.scala:53)
	at ammonite.MainRunner.runRepl(MainRunner.scala:72)
	at ammonite.AmmoniteMain$.main0(AmmoniteMain.scala:92)
	at ammonite.AmmoniteMain$.main(AmmoniteMain.scala:31)
	at ammonite.AmmoniteMain.main(AmmoniteMain.scala)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at coursier.bootstrap.launcher.a.a(Unknown Source)
	at coursier.bootstrap.launcher.Launcher.main(Unknown Source)

System information:

Chip: Apple M3 Pro
macOS: 14.1.1 (Sonoma)
Ammonite REPL & Script-Runner, 3.0.0-M0-59-cdeaa580
Scala code runner version 3.3.1 -- Copyright 2002-2023, LAMP/EPFL