The following test failed in the JDK20 CI:

applications/kitchensink/Kitchensink.java

Here's a snippet from the log file:

[2022-09-12T00:42:08.014733969Z] Waiting for completion for process 27291
[2022-09-12T00:42:08.014879193Z] Waiting for completion finished for process 27291
Output and diagnostic info for process 27291 was saved into 'pid-27291-output.log'
[stress.process.out] #
[stress.process.out] # A fatal error has been detected by the Java Runtime Environment:
[stress.process.out] #
[stress.process.out] # SIGSEGV (0xb) at pc=0x00007ffae9aff6d2, pid=20136, tid=29472
[stress.process.out] #
[stress.process.out] # JRE version: Java(TM) SE Runtime Environment (20.0+15) (build 20-ea+15-982)
[stress.process.out] # Java VM: Java HotSpot(TM) 64-Bit Server VM (20-ea+15-982, mixed mode, sharing, tiered, compressed class ptrs, z gc, linux-amd64)
[stress.process.out] # Problematic frame:
[stress.process.out] # J 71946 c2 java.net.URL.<init>(Ljava/net/URL;Ljava/lang/String;Ljava/net/URLStreamHandler;)V java.base@20-ea (543 bytes) @ 0x00007ffae9aff6d2 [0x00007ffae9afb920+0x0000000000003db2]
[stress.process.out] #
[stress.process.out] # Core dump will be written. Default location: Core dumps may be processed with "/opt/core.sh %p" (or dumping to /opt/mach5/mesos/work_dir/slaves/0c72054a-24ab-4dbb-944f-97f9341a1b96-S8517/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2b146f44-80bc-455b-a4d2-ff92e9196cc0/runs/3e63afe4-a31a-4f2b-891d-56aab567a64e/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_applications_kitchensink_Kitchensink_java/scratch/0/core.20136)
[stress.process.out] #
[stress.process.out] # JFR recording file will be written. Location: /opt/mach5/mesos/work_dir/slaves/0c72054a-24ab-4dbb-944f-97f9341a1b96-S8517/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2b146f44-80bc-455b-a4d2-ff92e9196cc0/runs/3e63afe4-a31a-4f2b-891d-56aab567a64e/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_applications_kitchensink_Kitchensink_java/scratch/0/hs_err_pid20136.jfr
[stress.process.out] #
[stress.process.out] Unsupported internal testing APIs have been used.
[stress.process.out]
[stress.process.out] # An error report file with more information is saved as:
[stress.process.out] # /opt/mach5/mesos/work_dir/slaves/0c72054a-24ab-4dbb-944f-97f9341a1b96-S8517/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2b146f44-80bc-455b-a4d2-ff92e9196cc0/runs/3e63afe4-a31a-4f2b-891d-56aab567a64e/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_applications_kitchensink_Kitchensink_java/scratch/0/hs_err_pid20136.log
[stress.process.out] [481.935s][warning][os] Loading hsdis library failed
[stress.process.out] #
[stress.process.out] # If you would like to submit a bug report, please visit:
[stress.process.out] # https://bugreport.java.com/bugreport/crash.jsp
[stress.process.out] #
[2022-09-12T00:43:08.019639314Z] Gathering output for process 29816
[2022-09-12T00:43:08.025734419Z] Waiting for completion for process 29816
[2022-09-12T00:43:08.025829980Z] Waiting for completion finished for process 29816
Output and diagnostic info for process 29816 was saved into 'pid-29816-output.log'

Here's the crashing thread's stack:

--------------- T H R E A D ---------------

Current thread (0x00007ff8100225c0): JavaThread "Program Runner for serial" [_thread_in_Java, id=29472, stack(0x00007ff85d452000,0x00007ff85d553000)]

Stack: [0x00007ff85d452000,0x00007ff85d553000], sp=0x00007ff85d550628, free space=1017k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
J 71946 c2 java.net.URL.<init>(Ljava/net/URL;Ljava/lang/String;Ljava/net/URLStreamHandler;)V java.base@20-ea (543 bytes) @ 0x00007ffae9aff6d2 [0x00007ffae9afb920+0x0000000000003db2]
C 0x00007ff85d5507d8


siginfo: si_signo: 11 (SIGSEGV), si_code: 1 (SEGV_MAPERR), si_addr: 0x0000000000000081