Not much to go on, since it would not repeat for me (on a different Sparc running Solaris 11):

.../fastdebug/comp_baseline/solaris-sparcv9//bin/java -d64 -server -Xcomp -XX:MaxRAMFraction=8 -XX:+CreateMinidumpOnCrash -ea -esa -XX:-TieredCompilation -XX:CompileThreshold=100 -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+AggressiveOpts -XX:-UseBiasedLocking nsk.regression.b4242412.b4242412

 # Test level exit status: 11

And a great big core file, with some relevant bits attached.