Nightly Dotty workflow of 2023-12-16 failed

[github-actions]

See https://github.com/lampepfl/dotty/actions/runs/7229362262

[som-snytt]

It looks like a thing.

[info] Test dotty.tools.dotc.CompilationTests.parallelBackend started
Error:  Test dotty.tools.dotc.CompilationTests.parallelBackend failed: java.util.concurrent.TimeoutException: Compiling targets timed out, remaining targets: out/parallelBackend/reference, took 1200.007 sec
Error:      at dotty.tools.vulpix.ParallelTesting$Test.executeTestSuite(ParallelTesting.scala:707)
Error:      at dotty.tools.vulpix.ParallelTesting$CompilationTest.checkPass(ParallelTesting.scala:1175)
Error:      at dotty.tools.vulpix.ParallelTesting$CompilationTest.checkCompile(ParallelTesting.scala:1112)
Error:      at dotty.tools.dotc.CompilationTests.parallelBackend(CompilationTests.scala:270)
Error:      at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Error:      at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
Error:      at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Error:      at java.lang.reflect.Method.invoke(Method.java:567)
Error:      ...

  unhandled exception while running genBCode on tests/pos/reference/auto-param-tupling.scala

  An unhandled exception was thrown in the compiler.
  Please file a crash report here:
  https://github.com/lampepfl/dotty/issues/new/choose

     while compiling: tests/pos/reference/auto-param-tupling.scala
        during phase: genBCode
                mode: Mode(ImplicitsEnabled,ReadPositions)
     library version: version 2.13.12
    compiler version: version 3.4.0-RC1-bin-SNAPSHOT-nonbootstrapped-git-1f7aa24
            settings: -Xsemanticdb true -Xunchecked-java-output-version 9 -Xverify-signatures true -Ybackend-parallelism 4 -Ycheck List(all) -Yforce-sbt-phases true -Yno-deep-subtypes true -Yno-double-bindings true -classpath /root/.cache/coursier/v1/https/scala-webapps.epfl.ch/artifactory/central/org/scala-lang/scala-library/2.13.12/scala-library-2.13.12.jar:/__w/dotty/dotty/library/../out/bootstrap/scala3-library-bootstrapped/scala-3.4.0-RC1-bin-SNAPSHOT-nonbootstrapped/scala3-library_3-3.4.0-RC1-bin-SNAPSHOT.jar:out/parallelBackend/reference -color never -d out/parallelBackend/reference -indent true -pagewidth 120

[dwijnand]

Duplicate of #19285