Little application which usually fails with OOME causes to crash with message 'pure virtual method called'

Java version:

Java(TM) SE Runtime Environment (fastdebug build 9-internal+0-2015-12-18-204348.kab.hs-rt)
Java HotSpot(TM) 64-Bit Server VM (fastdebug build 9-internal+0-2015-12-18-204348.kab.hs-rt, mixed mode)

VM options: -XX:+UseG1GC -Xmx40m -Xmn20m -Xlog:gc=info

Part of gdb bt command:
#0 0x00007f91dd385cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007f91dd3890d8 in __GI_abort () at abort.c:89
#2 0x00007f91dcb9cd7d in __gnu_cxx::__verbose_terminate_handler() ()
   from /home/cmv/reps/jdk/9/12_22/lib/amd64/server/libjvm.so
#3 0x00007f91dcb9b4b6 in __cxxabiv1::__terminate(void (*)()) () from /home/cmv/reps/jdk/9/12_22/lib/amd64/server/libjvm.so
#4 0x00007f91dcb9b501 in std::terminate() () from /home/cmv/reps/jdk/9/12_22/lib/amd64/server/libjvm.so
#5 0x00007f91dcb9b46f in __cxa_pure_virtual () from /home/cmv/reps/jdk/9/12_22/lib/amd64/server/libjvm.so
#6 0x00007f91dc64a0a0 in LogTagSet::log(LogLevel::type, char const*) ()
   from /home/cmv/reps/jdk/9/12_22/lib/amd64/server/libjvm.so
#7 0x00007f91dc009374 in void Log<(LogTag::type)16, (LogTag::type)0, (LogTag::type)0, (LogTag::type)0, (LogTag::type)0, (LogTag::type)0>::vwrite<(LogLevel::type)3>(char const*, __va_list_tag*) ()
   from /home/cmv/reps/jdk/9/12_22/lib/amd64/server/libjvm.so
#8 0x00007f91dc0094eb in void Log<(LogTag::type)16, (LogTag::type)0, (LogTag::type)0, (LogTag::type)0, (LogTag::type)0, (LogTag::type)0>::write<(LogLevel::type)3>(char const*, ...) () from /home/cmv/reps/jdk/9/12_22/lib/amd64/server/libjvm.so
#9 0x00007f91dc0b19b7 in ConcurrentMarkThread::run_service() () from /home/cmv/reps/jdk/9/12_22/lib/amd64/server/libjvm.so
#10 0x00007f91dc0b1d91 in ConcurrentMarkThread::run() () from /home/cmv/reps/jdk/9/12_22/lib/amd64/server/libjvm.so
#11 0x00007f91dc828842 in java_start(Thread*) () from /home/cmv/reps/jdk/9/12_22/lib/amd64/server/libjvm.so
#12 0x00007f91ddb36182 in start_thread (arg=0x7f91d837e700) at pthread_create.c:312
#13 0x00007f91dd44947d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Issue is reproducible. Happened one of 20 times.
Issue is not reproducible without -Xlog:gc=info.