java.lang.VerifyError when run tests with coverage

[sergewar]

When tried introduce scoverage in project with scala 3 (3.2.0-RC3) faced with next error

[info] sss.IsTest *** ABORTED ***
[info]   java.lang.VerifyError: Constructor must call super() or this() before return
[info] Exception Details:
[info]   Location:
[info]     sss/UserId$.<init>()V @0: return
[info]   Reason:
[info]     Error exists in the bytecode
[info]   Bytecode:
[info]     0000000: b1
[info]   at sss.Is$.<clinit>(Is.scala:11)
[info]   at sss.IsTest.testFun$proxy1$1(IsTest.scala:9)
[info]   at sss.IsTest.$init$$$anonfun$1(IsTest.scala:8)
[info]   at org.scalatest.Transformer.apply$$anonfun$1(Transformer.scala:22)
[info]   at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85)
[info]   at org.scalatest.OutcomeOf.outcomeOf$(OutcomeOf.scala:[31](https://github.com/sergewar/scala-scoverage-error/runs/7668222941?check_suite_focus=true#step:5:32))
[info]   at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
[info]   at org.scalatest.Transformer.apply(Transformer.scala:22)
[info]   at org.scalatest.Transformer.apply(Transformer.scala:21)
[info]   at org.scalatest.flatspec.AnyFlatSpecLike$$anon$5.apply(AnyFlatSpecLike.scala:1697)

Full stack trace here https://github.com/sergewar/scala-coverage-error/runs/7668222941?check_suite_focus=true#step:5:48

Example project https://github.com/sergewar/scala-coverage-error

[ckipp01]

Thanks for the report @sergewar. Is this the full stacktrace? I don't see any mention of scoverage in there? Either way, you'll need to report this upstream to https://github.com/lampepfl/dotty as that's where the instrumentation for coverage in Scala 3 is happening.

[sergewar]

I created ticket for scoverage because when run tests w/o coverage sbt clean reload test all tests passed and all good https://github.com/sergewar/scala-scoverage-error/runs/7668222941?check_suite_focus=true#step:4:1
But when run the same tests with coverage sbt clean reload coverage test coverageReport I get error
Full stack trace https://github.com/sergewar/scala-scoverage-error/runs/7668222941?check_suite_focus=true#step:5:48

[error] java.lang.VerifyError: Constructor must call super() or this() before return
[error] Exception Details:
[error]   Location:
[error]     sss/UserId$.<init>()V @0: return
[error]   Reason:
[error]     Error exists in the bytecode
[error]   Bytecode:
[error]     0000000: b1                                     
[error] 
[error] 	at sss.Is$.<clinit>(Is.scala:11)
[error] 	at sss.IsTest.testFun$proxy1$1(IsTest.scala:9)
[error] 	at sss.IsTest.$init$$$anonfun$1(IsTest.scala:8)
[error] 	at org.scalatest.Transformer.apply$$anonfun$1(Transformer.scala:22)
[error] 	at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85)
[error] 	at org.scalatest.OutcomeOf.outcomeOf$(OutcomeOf.scala:31)
[error] 	at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
[error] 	at org.scalatest.Transformer.apply(Transformer.scala:22)
[error] 	at org.scalatest.Transformer.apply(Transformer.scala:21)
[error] 	at org.scalatest.flatspec.AnyFlatSpecLike$$anon$5.apply(AnyFlatSpecLike.scala:1697)
[error] 	at org.scalatest.TestSuite.withFixture(TestSuite.scala:196)
[error] 	at org.scalatest.TestSuite.withFixture$(TestSuite.scala:138)
[error] 	at org.scalatest.flatspec.AnyFlatSpec.withFixture(AnyFlatSpec.scala:1685)
[error] 	at org.scalatest.flatspec.AnyFlatSpecLike.invokeWithFixture$1(AnyFlatSpecLike.scala:1703)
[error] 	at org.scalatest.flatspec.AnyFlatSpecLike.runTest$$anonfun$1(AnyFlatSpecLike.scala:1707)
[error] 	at org.scalatest.SuperEngine.runTestImpl(Engine.scala:306)
[error] 	at org.scalatest.flatspec.AnyFlatSpecLike.runTest(AnyFlatSpecLike.scala:1707)
[error] 	at org.scalatest.flatspec.AnyFlatSpecLike.runTest$(AnyFlatSpecLike.scala:[51](https://github.com/sergewar/scala-scoverage-error/runs/7668222941?check_suite_focus=true#step:5:52))
[error] 	at org.scalatest.flatspec.AnyFlatSpec.runTest(AnyFlatSpec.scala:1685)
[error] 	at org.scalatest.flatspec.AnyFlatSpecLike.runTests$$anonfun$1(AnyFlatSpecLike.scala:1765)
[error] 	at org.scalatest.SuperEngine.traverseSubNodes$1$$anonfun$1(Engine.scala:413)
[error] 	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error] 	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error] 	at scala.collection.immutable.List.foreach(List.scala:333)
[error] 	at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:429)
[error] 	at org.scalatest.SuperEngine.runTestsInBranch(Engine.scala:390)
[error] 	at org.scalatest.SuperEngine.traverseSubNodes$1$$anonfun$1(Engine.scala:427)
[error] 	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error] 	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error] 	at scala.collection.immutable.List.foreach(List.scala:333)
[error] 	at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:429)
[error] 	at org.scalatest.SuperEngine.runTestsInBranch(Engine.scala:396)
[error] 	at org.scalatest.SuperEngine.runTestsImpl(Engine.scala:475)
[error] 	at org.scalatest.flatspec.AnyFlatSpecLike.runTests(AnyFlatSpecLike.scala:1765)
[error] 	at org.scalatest.flatspec.AnyFlatSpecLike.runTests$(AnyFlatSpecLike.scala:51)
[error] 	at org.scalatest.flatspec.AnyFlatSpec.runTests(AnyFlatSpec.scala:1685)
[error] 	at org.scalatest.Suite.run(Suite.scala:1114)
[error] 	at org.scalatest.Suite.run$(Suite.scala:564)
[error] 	at org.scalatest.flatspec.AnyFlatSpec.org$scalatest$flatspec$AnyFlatSpecLike$$super$run(AnyFlatSpec.scala:1685)
[error] 	at org.scalatest.flatspec.AnyFlatSpecLike.run$$anonfun$1(AnyFlatSpecLike.scala:1810)
[error] 	at org.scalatest.SuperEngine.runImpl(Engine.scala:535)
[error] 	at org.scalatest.flatspec.AnyFlatSpecLike.run(AnyFlatSpecLike.scala:1810)
[error] 	at org.scalatest.flatspec.AnyFlatSpecLike.run$(AnyFlatSpecLike.scala:51)
[error] 	at org.scalatest.flatspec.AnyFlatSpec.run(AnyFlatSpec.scala:1685)
[error] 	at org.scalatest.tools.Framework.org$scalatest$tools$Framework$$runSuite(Framework.scala:321)
[error] 	at org.scalatest.tools.Framework$ScalaTestTask.execute(Framework.scala:516)
[error] 	at sbt.TestRunner.runTest$1(TestFramework.scala:146)
[error] 	at sbt.TestRunner.run(TestFramework.scala:161)
[error] 	at sbt.TestFramework$$anon$3$$anonfun$$lessinit$greater$1.$anonfun$apply$1(TestFramework.scala:324)
[error] 	at sbt.TestFramework$.sbt$TestFramework$$withContextLoader(TestFramework.scala:284)
[error] 	at sbt.TestFramework$$anon$3$$anonfun$$lessinit$greater$1.apply(TestFramework.scala:324)
[error] 	at sbt.TestFramework$$anon$3$$anonfun$$lessinit$greater$1.apply(TestFramework.scala:324)
[error] 	at sbt.TestFunction.apply(TestFramework.scala:336)
[error] 	at sbt.Tests$.$anonfun$toTask$1(Tests.scala:435)
[error] 	at sbt.std.Transform$$anon$3.$anonfun$apply$2(Transform.scala:46)
[error] 	at sbt.std.Transform$$anon$4.work(Transform.scala:68)
[error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:282)
[error] 	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
[error] 	at sbt.Execute.work(Execute.scala:291)
[error] 	at sbt.Execute.$anonfun$submit$1(Execute.scala:282)
[error] 	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:64)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
[error] 	at java.base/java.lang.Thread.run(Thread.java:833)
[error] (Test / executeTests) java.lang.VerifyError: Constructor must call super() or this() before return
[error] Exception Details:
[error]   Location:
[error]     sss/UserId$.<init>()V @0: return
[error]   Reason:
[error]     Error exists in the bytecode
[error]   Bytecode:
[error]     0000000: b1                                     
[error] Total time: 8 s, completed Aug 4, 2022, 8:31:44 AM

Error: Process completed with exit code 1.

[ckipp01]

I created ticket for scoverage because when run tests w/o coverage sbt clean reload test all tests passed and all good

Sure, but for Scala 3 all sbt-scoverage is doing is setting the correct compiler flag for the compiler to create coverage data. In this scenario that seems to be screwing up compilation somehow, so the report will need to go there.

[sergewar]

Thank you! Joined to discussion in upstream project