Build fails with Java 12

[pnrao]

The version of SBT used (build.properties refers to sbt.version=0.13.6) seems to be incompatible with a current JDK (v12 on Archlinux, at the time of writing). I get the following error in my build log:

[info] Loading project definition from /mnt/bluewest/src/mozart2/bootcompiler/project [info] Updating {file:/mnt/bluewest/src/mozart2/bootcompiler/project/}bootcompiler-build... WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by sbt.ivyint.ErrorMessageAuthenticator$ (file:/home/prash/.sbt/boot/scala-2.10.4/org.scala-sbt/sbt/0.13.6/ivy-0.13.6.jar) to field java.net.Authenticator.theAuthenticator WARNING: Please consider reporting this to the maintainers of sbt.ivyint.ErrorMessageAuthenticator$ WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [info] Resolving org.fusesource.jansi#jansi;1.4 ... [info] Done updating. java.lang.NullPointerException at java.base/java.util.regex.Matcher.getTextLength(Matcher.java:1770) at java.base/java.util.regex.Matcher.reset(Matcher.java:416) at java.base/java.util.regex.Matcher.<init>(Matcher.java:253) at java.base/java.util.regex.Pattern.matcher(Pattern.java:1133) at java.base/java.util.regex.Pattern.split(Pattern.java:1261) at java.base/java.util.regex.Pattern.split(Pattern.java:1334) at sbt.IO$.pathSplit(IO.scala:744) at sbt.IO$.parseClasspath(IO.scala:859) at sbt.compiler.CompilerArguments.extClasspath(CompilerArguments.scala:62) at sbt.compiler.AggressiveCompile.withBootclasspath(AggressiveCompile.scala:50) at sbt.compiler.AggressiveCompile.compile2(AggressiveCompile.scala:83) at sbt.compiler.AggressiveCompile.compile1(AggressiveCompile.scala:70) at sbt.compiler.AggressiveCompile.apply(AggressiveCompile.scala:45) at sbt.Compiler$.apply(Compiler.scala:74) at sbt.Compiler$.apply(Compiler.scala:65) at sbt.Defaults$.sbt$Defaults$$compileTaskImpl(Defaults.scala:777) at sbt.Defaults$$anonfun$compileTask$1.apply(Defaults.scala:769) at sbt.Defaults$$anonfun$compileTask$1.apply(Defaults.scala:769) at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47) at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40) at sbt.std.Transform$$anon$4.work(System.scala:63) at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226) at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226) at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17) at sbt.Execute.work(Execute.scala:235) at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226) at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226) at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159) at sbt.CompletionService$$anon$2.call(CompletionService.scala:28) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:835) [error] (compile:compile) java.lang.NullPointerException Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore? make[2]: *** [bootcompiler/CMakeFiles/bootcompiler.dir/build.make:105: bootcompiler/bootcompiler.jar] Error 1 make[1]: *** [CMakeFiles/Makefile2:529: bootcompiler/CMakeFiles/bootcompiler.dir/all] Error 2

I tried to fudge the sbt.version in build.properties to 1.3.2, but that required scalaVersion=2.12. I then changed scalaVersion to the latest, 2.13.1. Going down that rabbit hole, I discovered that a dependency, sbt-onejar, hasn't been updated in the last 5 years. I lack the requisite expertise in SBT and Scala to go any further than this.

Could an expert please look into this issue?

[sjrd]

Have you tried sbt 0.13.18, which is the latest version in the 0.13.x series?

[pnrao]

I followed your suggestion, but I triggered this bug https://github.com/sbt/launcher/issues/38 which seems to have been fixed in the sbt-1.x series.