Compiler prints stacktrace on syntax error involving case and missing parens

[ekrich]

Compiler version

3.0.0

Minimized code

Removing {} or () causes sytax error and stacktrace.

object Foo:
  def joe(): List[(Int, Int)] =
    List((2, 3), (3, 4)).filter case (a, b) => b > a 

Output

[info] compiling 1 Scala source to /Users/eric/workspace/sconfig/sconfig/js/target/scala-3.0.0/classes ...
[error] -- [E040] Syntax Error: /Users/eric/workspace/sconfig/sconfig/shared/src/main/scala-3/org/ekrich/config/Foo.scala:3:32 
[error] 3 |    List((2, 3), (3, 4)).filter case (a, b) => b > a 
[error]   |                                ^^^^
[error]   |                                unindent expected, but 'case' found
[error] -- [E040] Syntax Error: /Users/eric/workspace/sconfig/sconfig/shared/src/main/scala-3/org/ekrich/config/Foo.scala:4:0 
[error] 4 |
[error]   |^
[error]   |unindent expected, but eof found
[info] exception occurred while parsing /Users/eric/workspace/sconfig/sconfig/shared/src/main/scala-3/org/ekrich/config/Foo.scala
[info] exception occurred while compiling /Users/eric/workspace/sconfig/sconfig/shared/src/main/scala-3/org/ekrich/config/Foo.scala
java.lang.AssertionError: assertion failed: dotty.tools.dotc.parsing.Scanners$$anon$1@7f30df73 while compiling /Users/eric/workspace/sconfig/sconfig/shared/src/main/scala-3/org/ekrich/config/Foo.scala
[error] ## Exception when compiling 108 sources to /Users/eric/workspace/sconfig/sconfig/js/target/scala-3.0.0/classes
[error] java.lang.AssertionError: assertion failed: dotty.tools.dotc.parsing.Scanners$$anon$1@7f30df73
[error] scala.runtime.Scala3RunTime$.assertFailed(Scala3RunTime.scala:8)
[error] dotty.tools.dotc.parsing.Scanners$Scanner.insert(Scanners.scala:360)
[error] dotty.tools.dotc.parsing.Scanners$Scanner.observeOutdented(Scanners.scala:586)
[error] dotty.tools.dotc.parsing.Parsers$Parser.acceptStatSepUnlessAtEnd(Parsers.scala:327)
[error] dotty.tools.dotc.parsing.Parsers$Parser.blockStatSeq$$anonfun$1(Parsers.scala:3938)
[error] dotty.tools.dotc.parsing.Parsers$Parser.checkNoEscapingPlaceholders(Parsers.scala:462)
[error] dotty.tools.dotc.parsing.Parsers$Parser.blockStatSeq(Parsers.scala:3941)
[error] dotty.tools.dotc.parsing.Parsers$Parser.block(Parsers.scala:2416)
[error] dotty.tools.dotc.parsing.Parsers$Parser.blockExpr$$anonfun$1(Parsers.scala:2408)
[error] dotty.tools.dotc.parsing.Parsers$Parser.enclosed(Parsers.scala:518)
[error] dotty.tools.dotc.parsing.Parsers$Parser.inBracesOrIndented(Parsers.scala:530)
[error] dotty.tools.dotc.parsing.Parsers$Parser.inDefScopeBraces(Parsers.scala:538)
[error] dotty.tools.dotc.parsing.Parsers$Parser.blockExpr(Parsers.scala:2406)
[error] dotty.tools.dotc.parsing.Parsers$Parser.simpleExpr(Parsers.scala:2235)
[error] dotty.tools.dotc.parsing.Parsers$Parser.$init$$$anonfun$6(Parsers.scala:2191)
[error] dotty.tools.dotc.parsing.Parsers$Parser.postfixExpr(Parsers.scala:2168)
[error] dotty.tools.dotc.parsing.Parsers$Parser.expr1(Parsers.scala:2013)
[error] dotty.tools.dotc.parsing.Parsers$Parser.expr(Parsers.scala:1892)
[error] dotty.tools.dotc.parsing.Parsers$Parser.$init$$$anonfun$5(Parsers.scala:1872)
[error] dotty.tools.dotc.parsing.Parsers$Parser.subPart(Parsers.scala:590)
[error] dotty.tools.dotc.parsing.Parsers$Parser.subExpr(Parsers.scala:1874)
[error] dotty.tools.dotc.parsing.Parsers$Parser.defDefOrDcl(Parsers.scala:3328)
[error] dotty.tools.dotc.parsing.Parsers$Parser.defOrDcl(Parsers.scala:3219)
[error] dotty.tools.dotc.parsing.Parsers$Parser.templateStatSeq$$anonfun$1(Parsers.scala:3851)
[error] dotty.tools.dotc.parsing.Parsers$Parser.checkNoEscapingPlaceholders(Parsers.scala:462)
[error] dotty.tools.dotc.parsing.Parsers$Parser.templateStatSeq(Parsers.scala:3861)
[error] dotty.tools.dotc.parsing.Parsers$Parser.$anonfun$33(Parsers.scala:3740)
[error] dotty.tools.dotc.parsing.Parsers$Parser.enclosed(Parsers.scala:518)
[error] dotty.tools.dotc.parsing.Parsers$Parser.inBracesOrIndented(Parsers.scala:530)
[error] dotty.tools.dotc.parsing.Parsers$Parser.inDefScopeBraces(Parsers.scala:538)
[error] dotty.tools.dotc.parsing.Parsers$Parser.templateBody(Parsers.scala:3740)
[error] dotty.tools.dotc.parsing.Parsers$Parser.templateBodyOpt(Parsers.scala:3733)
[error] dotty.tools.dotc.parsing.Parsers$Parser.template(Parsers.scala:3710)
[error] dotty.tools.dotc.parsing.Parsers$Parser.templateOpt(Parsers.scala:3722)
[error] dotty.tools.dotc.parsing.Parsers$Parser.objectDef(Parsers.scala:3474)
[error] dotty.tools.dotc.parsing.Parsers$Parser.tmplDef(Parsers.scala:3433)
[error] dotty.tools.dotc.parsing.Parsers$Parser.defOrDcl(Parsers.scala:3225)
[error] dotty.tools.dotc.parsing.Parsers$Parser.topStatSeq(Parsers.scala:3797)
[error] dotty.tools.dotc.parsing.Parsers$Parser.topstats$2(Parsers.scala:3977)
[error] dotty.tools.dotc.parsing.Parsers$Parser.compilationUnit$$anonfun$1(Parsers.scala:3982)
[error] dotty.tools.dotc.parsing.Parsers$Parser.checkNoEscapingPlaceholders(Parsers.scala:462)
[error] dotty.tools.dotc.parsing.Parsers$Parser.compilationUnit(Parsers.scala:3987)
[error] dotty.tools.dotc.parsing.Parsers$Parser.parse(Parsers.scala:175)
[error] dotty.tools.dotc.typer.FrontEnd.parse$$anonfun$1(FrontEnd.scala:57)
[error] dotty.tools.dotc.typer.FrontEnd.monitor(FrontEnd.scala:43)
[error] dotty.tools.dotc.typer.FrontEnd.parse(FrontEnd.scala:67)
[error] dotty.tools.dotc.typer.FrontEnd.runOn$$anonfun$1(FrontEnd.scala:108)
[error] scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error] scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error] scala.collection.immutable.List.foreach(List.scala:333)
[error] dotty.tools.dotc.typer.FrontEnd.runOn(FrontEnd.scala:108)
[error] dotty.tools.dotc.Run.runPhases$4$$anonfun$4(Run.scala:205)
[error] scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
[error] scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
[error] scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1323)
[error] dotty.tools.dotc.Run.runPhases$5(Run.scala:215)
[error] dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:223)
[error] scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
[error] dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:67)
[error] dotty.tools.dotc.Run.compileUnits(Run.scala:230)
[error] dotty.tools.dotc.Run.compileSources(Run.scala:166)
[error] dotty.tools.dotc.Run.compile(Run.scala:150)
[error] dotty.tools.dotc.Driver.doCompile(Driver.scala:39)
[error] dotty.tools.xsbt.CompilerBridgeDriver.run(CompilerBridgeDriver.java:88)
[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$7(MixedAnalyzingCompiler.scala:186)
[error] scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
[error] sbt.internal.inc.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:241)
[error] sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4(MixedAnalyzingCompiler.scala:176)
[error] sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4$adapted(MixedAnalyzingCompiler.scala:157)
[error] sbt.internal.inc.JarUtils$.withPreviousJar(JarUtils.scala:239)
[error] sbt.internal.inc.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:157)
[error] sbt.internal.inc.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:204)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1(IncrementalCompilerImpl.scala:528)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1$adapted(IncrementalCompilerImpl.scala:528)
[error] sbt.internal.inc.Incremental$.$anonfun$apply$5(Incremental.scala:174)
[error] sbt.internal.inc.Incremental$.$anonfun$apply$5$adapted(Incremental.scala:172)
[error] sbt.internal.inc.Incremental$$anon$2.run(Incremental.scala:457)
[error] sbt.internal.inc.IncrementalCommon$CycleState.next(IncrementalCommon.scala:116)
[error] sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:56)
[error] sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:52)
[error] sbt.internal.inc.IncrementalCommon.cycle(IncrementalCommon.scala:261)
[error] sbt.internal.inc.Incremental$.$anonfun$incrementalCompile$8(Incremental.scala:412)
[error] sbt.internal.inc.Incremental$.withClassfileManager(Incremental.scala:499)
[error] sbt.internal.inc.Incremental$.incrementalCompile(Incremental.scala:399)
[error] sbt.internal.inc.Incremental$.apply(Incremental.scala:166)
[error] sbt.internal.inc.IncrementalCompilerImpl.compileInternal(IncrementalCompilerImpl.scala:528)
[error] sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileIncrementally$1(IncrementalCompilerImpl.scala:482)
[error] sbt.internal.inc.IncrementalCompilerImpl.handleCompilationError(IncrementalCompilerImpl.scala:332)
[error] sbt.internal.inc.IncrementalCompilerImpl.compileIncrementally(IncrementalCompilerImpl.scala:420)
[error] sbt.internal.inc.IncrementalCompilerImpl.compile(IncrementalCompilerImpl.scala:137)
[error] sbt.Defaults$.compileIncrementalTaskImpl(Defaults.scala:2346)
[error] sbt.Defaults$.$anonfun$compileIncrementalTask$2(Defaults.scala:2303)
[error] sbt.internal.io.Retry$.apply(Retry.scala:46)
[error] sbt.internal.io.Retry$.apply(Retry.scala:28)
[error] sbt.internal.io.Retry$.apply(Retry.scala:23)
[error] sbt.internal.server.BspCompileTask$.compute(BspCompileTask.scala:31)
[error] sbt.Defaults$.$anonfun$compileIncrementalTask$1(Defaults.scala:2299)
[error] scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error] sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
[error] sbt.std.Transform$$anon$4.work(Transform.scala:68)
[error] sbt.Execute.$anonfun$submit$2(Execute.scala:282)
[error] sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
[error] sbt.Execute.work(Execute.scala:291)
[error] sbt.Execute.$anonfun$submit$1(Execute.scala:282)
[error] sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error] sbt.CompletionService$$anon$2.call(CompletionService.scala:64)
[error] java.util.concurrent.FutureTask.run(FutureTask.java:266)
[error] java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[error] java.util.concurrent.FutureTask.run(FutureTask.java:266)
[error] java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[error] java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[error] java.lang.Thread.run(Thread.java:748)
[error]            

Expectation

No stacktrace