$ export JAVA_HOME=<point to fastdebug build>
$ export PATH=$JAVA_HOME/bin:$PATH
$ cd test/hotspot/jtreg/testlibrary/ctw
$ make
$ cd dist
$ wget https://repo1.maven.org/maven2/com/addthis/basis/basis-core/4.3.1/basis-core-4.3.1.jar
$ JAVA_OPTIONS="-XX:+UseShenandoahGC" ./ctw.sh basis-core-4.3.1.jar

...
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/home/shade/trunks/jdk/src/hotspot/share/opto/compile.cpp:2230), pid=3355142, tid=3355183
# assert(igvn._worklist.size() == 0) failed: not empty

Current CompileTask:
C2: 3020 3384 b 4 com.addthis.basis.util.TokenReplacer::process (199 bytes)

Stack: [0x00007f198f0f1000,0x00007f198f1f2000], sp=0x00007f198f1ed660, free space=1009k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0xa1d8d7] Compile::Optimize()+0x12b7
V [libjvm.so+0xa1f11a] Compile::Compile(ciEnv*, ciMethod*, int, bool, bool, bool, bool, DirectiveSet*)+0x182a
V [libjvm.so+0x85c252] C2Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x1d2
V [libjvm.so+0xa30828] CompileBroker::invoke_compiler_on_method(CompileTask*)+0xea8
V [libjvm.so+0xa313e8] CompileBroker::compiler_thread_loop()+0x5b8
V [libjvm.so+0x19f5746] JavaThread::thread_main_inner()+0x266
V [libjvm.so+0x19fc1f4] Thread::call_run()+0x104
V [libjvm.so+0x159824e] thread_native_entry(Thread*)+0x11e