The following test failed in the JDK13 CI:

gtest/GTestWrapper.java

Here's a snippet from the log file:

[----------] 1 test from markOopDesc
[ RUN ] markOopDesc.printing_test_vm
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/semaphore_posix.cpp:56
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/scratch/opt/mach5/mesos/work_dir/797e873e-e550-4bd3-abe4-140aca3eb239/workspace/open/src/hotspot/os/posix/semaphore_posix.cpp:56), pid=22645, tid=84
# assert(ret == 0) failed: sem_post failed; error='Invalid argument' (errno=EINVAL)
#
# JRE version: Java(TM) SE Runtime Environment (13.0) (fastdebug build 13-internal+0-jdk-13-961)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 13-internal+0-jdk-13-961, mixed mode, tiered, compressed oops, g1 gc, solaris-sparc)
# Core dump will be written. Default location: /opt/mach5/mesos/work_dir/09936a6a-dfa4-4963-b63d-cd1813e707c6/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_common/scratch/0/core or core.22645
#
# An error report file with more information is saved as:
# /opt/mach5/mesos/work_dir/09936a6a-dfa4-4963-b63d-cd1813e707c6/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_common/scratch/0/hs_err_pid22645.log
[ OK ] markOopDesc.printing_test_vm (272 ms)
[----------] 1 test from markOopDesc (272 ms total)