tools/launcher/RunpathTest.java fails with java.lang.NullPointerException

----------System.err:(31/1793)----------
Warning: no suitable elf reader!
java.lang.NullPointerException
at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1090)
at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1071)
at TestHelper.doExec(TestHelper.java:458)
at TestHelper.doExec(TestHelper.java:429)
at RunpathTest.elfCheck(RunpathTest.java:57)
at RunpathTest.testRpath(RunpathTest.java:68)
at RunpathTest.main(RunpathTest.java:74)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:230)
at java.base/java.lang.Thread.run(Thread.java:844)
java.lang.RuntimeException
at TestHelper.doExec(TestHelper.java:472)
at TestHelper.doExec(TestHelper.java:429)
at RunpathTest.elfCheck(RunpathTest.java:57)
at RunpathTest.testRpath(RunpathTest.java:68)
at RunpathTest.main(RunpathTest.java:74)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:230)
at java.base/java.lang.Thread.run(Thread.java:844)