Issue trying to rebuild your demo within Eclipse (using GraalVM on JDK11)

[col-panic]

I created an Eclipse project, with an Execution Environment etc. to get your demo running. Everything seems ok, until the point I perform

Context graalContext = Context.create()

leaving me with a

java.lang.InternalError: Multiple org.graalvm.polyglot.impl.AbstractPolyglotImpl providers found
	at org.graalvm.sdk/org.graalvm.polyglot.Engine$1.run(Engine.java:608)
	at org.graalvm.sdk/org.graalvm.polyglot.Engine$1.run(Engine.java:580)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at org.graalvm.sdk/org.graalvm.polyglot.Engine.initEngineImpl(Engine.java:580)
	at org.graalvm.sdk/org.graalvm.polyglot.Engine.access$000(Engine.java:99)
	at org.graalvm.sdk/org.graalvm.polyglot.Engine$ImplHolder.<clinit>(Engine.java:108)
	at org.graalvm.sdk/org.graalvm.polyglot.Engine.getImpl(Engine.java:261)
	at org.graalvm.sdk/org.graalvm.polyglot.Engine$Builder.build(Engine.java:484)
	at org.graalvm.sdk/org.graalvm.polyglot.Context$Builder.build(Context.java:1083)
	at org.graalvm.sdk/org.graalvm.polyglot.Context.create(Context.java:660)
	at info.elexis.server.misthios.internal.MisthiosJavascriptBundle.execute(MisthiosJavascriptBundle.java:23)
	at info.elexis.server.misthios.MisthiosTest.testJavascriptBundle(MisthiosTest.java:44)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
	at org.eclipse.pde.internal.junit.runtime.RemotePluginTestRunner.main(RemotePluginTestRunner.java:232)
	at org.eclipse.pde.internal.junit.runtime.CoreTestApplication.run(CoreTestApplication.java:27)
	at org.eclipse.pde.internal.junit.runtime.NonUIThreadTestApplication.runApp(NonUIThreadTestApplication.java:57)
	at org.eclipse.pde.internal.junit.runtime.NonUIThreadTestApplication.start(NonUIThreadTestApplication.java:49)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:199)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:391)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:246)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:595)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1501)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1474)

This is when I add the parameters (derived from your script)

--module-path=/Users/marco/test/graal-js-jdk11-maven-demo/target/compiler
-XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI
--upgrade-module-path=/Users/marco/test/graal-js-jdk11-maven-demo/target/compiler/compiler.jar

If I start JVM11 without graal it works.