Question regarding JVM crashes in GC

[Michael Rasmussen]

Ok

Found Shipilev's fastdebug builds, and tried running with that
(openjdk-jdk9-dev-fastdebug-2017-04-04.tar.gz).

Using the fastdebug build and running with G1, the JVM crashes when
calling System.gc(), with one of the following assertions:

Internal Error (hotspot/src/share/vm/gc/serial/markSweep.inline.hpp:61)
assert(is_archive_object(obj) || new_obj != __null || obj->mark() ==
markOopDesc::prototype() || (UseBiasedLocking &&
obj->mark()->has_bias_pattern())) failed: should be forwarded

Internal Error (hotspot/src/share/vm/gc/serial/markSweep.inline.hpp:53)
assert(Universe::heap()->is_in(obj)) failed: should be in heap

Internal Error (hotspot/src/share/vm/gc/serial/markSweep.inline.hpp:65)
assert(Universe::heap()->is_in_reserved(new_obj)) failed: should be in
object space

/Michael