Adding plugin to sbt project results in java.lang.RuntimeException

[apple-corps]

[info] welcome to sbt 1.7.3 (Eclipse Adoptium Java 17.0.7)
[info] loading global plugins from /Users/apple.corps/.sbt/1.0/plugins
[info] loading settings for project semvers-build from scala2PlantUML.sbt ...
[info] loading project definition from /Users/apple.corps/code/my-project/semvers/project
[error] java.lang.RuntimeException: found version conflict(s) in library dependencies; some are suspected to be binary incompatible:
[error]
[error] * org.scala-lang.modules:scala-xml_2.12:2.1.0 (early-semver) is selected over {1.3.0, 1.0.6}
[error] +- org.scala-lang:scala-compiler:2.12.17 (depends on 2.1.0)
[error] +- org.scala-sbt:testing_2.12:1.4.8 (depends on 1.3.0)
[error] +- org.scala-sbt:sbinary_2.12:0.5.1 (depends on 1.0.6)
[error] +- org.scala-sbt:main_2.12:1.4.8 (depends on 1.3.0)
[error] +- io.get-coursier:lm-coursier-shaded_2.12:2.0.6 (depends on 1.3.0)
[error]
[error]
[error] this can be overridden using libraryDependencySchemes or evictionErrorLevel
[error] at scala.sys.package$.error(package.scala:30)
[error] at sbt.internal.LibraryManagement$.resolve$1(LibraryManagement.scala:89)
[error] at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$12(LibraryManagement.scala:133)
[error] at sbt.util.Tracked$.$anonfun$lastOutput$1(Tracked.scala:73)
[error] at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$20(LibraryManagement.scala:146)
[error] at scala.util.control.Exception$Catch.apply(Exception.scala:228)
[error] at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$11(LibraryManagement.scala:146)
[error] at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$11$adapted(LibraryManagement.scala:127)
[error] at sbt.util.Tracked$.$anonfun$inputChangedW$1(Tracked.scala:219)
[error] at sbt.internal.LibraryManagement$.cachedUpdate(LibraryManagement.scala:160)
[error] at sbt.Classpaths$.$anonfun$updateTask0$1(Defaults.scala:3687)
[error] at scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error] at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
[error] at sbt.std.Transform$$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] (update) found version conflict(s) in library dependencies; some are suspected to be binary incompatible:
[error]
[error] * org.scala-lang.modules:scala-xml_2.12:2.1.0 (early-semver) is selected over {1.3.0, 1.0.6}
[error] +- org.scala-lang:scala-compiler:2.12.17 (depends on 2.1.0)
[error] +- org.scala-sbt:testing_2.12:1.4.8 (depends on 1.3.0)
[error] +- org.scala-sbt:sbinary_2.12:0.5.1 (depends on 1.0.6)
[error] +- org.scala-sbt:main_2.12:1.4.8 (depends on 1.3.0)
[error] +- io.get-coursier:lm-coursier-shaded_2.12:2.0.6 (depends on 1.3.0)
[error]
[error]
[error] this can be overridden using libraryDependencySchemes or evictionErrorLevel
[warn] Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore? (default: r)

[apple-corps]

Adoptium Java 11 results in the same RuntimeException

[apple-corps]

Azul Java 8 results in the same RuntimeException

[SethTisue]

it's extremely unlikely that anything will break if you tell sbt to ignore the scala-xml version conflict. you can throw this in your project/plugins.sbt:

ThisBuild / libraryDependencySchemes += "org.scala-lang.modules" %% "scala-xml" % VersionScheme.Always

and move on

that said, it would be nice if this plugin were to be upgraded to use scala-xml 2.0, which is the version that pretty much the whole rest of the sbt plugin ecosystem is on these days