Looks like memory is badly initialized when -XX:+ZeroTLAB is specified.

$ CONF=linux-x86_64-zero-fastdebug make exploded-test TEST=compiler/memoryinitialization/ZeroTLABTest.java

command: main -Xcomp -XX:+UseTLAB -XX:+ZeroTLAB compiler.memoryinitialization.ZeroTLABTest
reason: User specified action: run main/othervm -Xcomp -XX:+UseTLAB -XX:+ZeroTLAB compiler.memoryinitialization.ZeroTLABTest
Mode: othervm [/othervm specified]
elapsed time (seconds): 0.098
configuration:
STDOUT:
Error occurred during initialization of VM
java.lang.NullPointerException
at java.lang.System.getProperty(java.base/System.java:836)
at sun.security.action.GetPropertyAction.privilegedGetProperty(java.base/GetPropertyAction.java:105)
at java.nio.charset.Charset.defaultCharset(java.base/Charset.java:604)
at java.lang.StringCoding.decode(java.base/StringCoding.java:329)
at java.lang.String.<init>(java.base/String.java:609)
at java.lang.String.<init>(java.base/String.java:631)
at jdk.internal.util.SystemProps$Raw.platformProperties(java.base/Native Method)
at jdk.internal.util.SystemProps$Raw.<init>(java.base/SystemProps.java:233)
at jdk.internal.util.SystemProps.initProperties(java.base/SystemProps.java:54)
at java.lang.System.initPhase1(java.base/System.java:1988)