Bug: CTW fails compiling java/util/Base64$Encode

[Roland Westrelin]

> Roland, can you take a look?
>
> Seems to be reliably reproducible in 2 minutes with current jdk/jdk:
>
> CONF=linux-x86_64-server-fastdebug make run-test TEST=applications/ctw/modules/
> TEST_VM_OPTS="-XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:-TieredCompilation
> -XX:+UnlockDiagnosticVMOptions -XX:+ShenandoahVerifyOptoBarriers"

That command runs to completion on my machine. Would you have replay +
hs_err files?

Roland.