Version 0.8.0 fails to instrument Java 11 classes

[John Brinnand]

When I migrated to Java 11 and quasar 0.8.0 and Vertx core 4.0.0-milestone5. The following errors were encountered. The first is that quasar fails to instrument any class - failing out of the box with this Exception:

[quasar] ERROR: java/lang/Object
java.lang.IllegalArgumentException
at co.paralleluniverse.asm.ClassReader.(Unknown Source)
at co.paralleluniverse.asm.ClassReader.(Unknown Source)
at co.paralleluniverse.asm.ClassReader.(Unknown Source)
at co.paralleluniverse.fibers.instrument.MethodDatabase.checkFileAndClose(MethodDatabase.java:344)
at co.paralleluniverse.fibers.instrument.MethodDatabase.checkClass(MethodDatabase.java:324)
at co.paralleluniverse.fibers.instrument.MethodDatabase.getOrLoadClassEntry(MethodDatabase.java:183)
at co.paralleluniverse.fibers.instrument.SimpleSuspendableClassifier.isSuspendable(SimpleSuspendableClassifier.java:156)
at co.paralleluniverse.fibers.instrument.SimpleSuspendableClassifier.isSuspendable(SimpleSuspendableClassifier.java:164)
at co.paralleluniverse.fibers.instrument.DefaultSuspendableClassifier.isSuspendable(DefaultSuspendableClassifier.java:47)
at co.paralleluniverse.fibers.instrument.InstrumentClass.visitMethod(InstrumentClass.java:147)
at co.paralleluniverse.asm.ClassReader.b(Unknown Source)
at co.paralleluniverse.asm.ClassReader.accept(Unknown Source)
at co.paralleluniverse.asm.ClassReader.accept(Unknown Source)
at co.paralleluniverse.fibers.instrument.QuasarInstrumentor.instrumentClass(QuasarInstrumentor.java:134)
at co.paralleluniverse.fibers.instrument.QuasarInstrumentor.instrumentClass(QuasarInstrumentor.java:94)
at co.paralleluniverse.fibers.instrument.JavaAgent$Transformer.transform(JavaAgent.java:209)
at java.instrument/java.lang.instrument.ClassFileTransformer.transform(ClassFileTransformer.java:246)
at java.instrument/sun.instrument.TransformerManager.transform(TransformerManager.java:188)
at java.instrument/sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:563)
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174)
at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:802)
at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:700)
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:623)
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
at org.slf4j.impl.StaticLoggerBinder.(StaticLoggerBinder.java:59)
at org.slf4j.impl.StaticLoggerBinder.(StaticLoggerBinder.java:50)
at org.slf4j.LoggerFactory.bind(LoggerFactory.java:150)
at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124)
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:417)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:362)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:388)
at com.hotleads.web.app.MainApplication.(MainApplication.java:17)

However when I change SDK to Java 1.8 and quasar 0.7.5 and Vertx core 4.0.0-milestone2, things work as expected. Note - that this may not be a Vertx-Quasar issue. When the SDK is changed to Java 11 - quasar fails to instrument every single class at runtime. Please advise. Having to keep my platform at 1.8 is not advisable and migrating to Java 11 using quasar 0.8.0 fails out the box. What am I missing?