../build/fastdebug/images/jdk/bin/java --enable-preview -XX:+UseAltSubstitutabilityMethod -Xint Test.java
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/.../open/src/hotspot/share/oops/instanceKlass.hpp:650), pid=3545186, tid=3545189
# assert(_acmp_maps_offset != 0) failed: Not initialized
#

Stack: [0x00007f0e25700000,0x00007f0e25800000], sp=0x00007f0e257fcf20, free space=1011k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x1d437a1] Unsafe_GetFieldMap0+0x4f1 (instanceKlass.hpp:650)
j jdk.internal.misc.Unsafe.getFieldMap0(Ljava/lang/Class;)[I+0 java.base@27-jep401ea2
j jdk.internal.misc.Unsafe.getFieldMap(Ljava/lang/Class;)[I+14 java.base@27-jep401ea2
j java.lang.runtime.ValueObjectMethods.isSubstitutableAlt(Ljava/lang/Object;Ljava/lang/Object;)Z+49 java.base@27-jep401ea2
v ~StubRoutines::Stub Generator call_stub_stub 0x00007f0e142015fd
V [libjvm.so+0x11ad5df] JavaCalls::call_helper(JavaValue*, methodHandle const&, JavaCallArguments*, JavaThread*)+0x4ff
V [libjvm.so+0x118ba29] InterpreterRuntime::is_substitutable(JavaThread*, oopDesc*, oopDesc*)+0x3c9
j java.time.LocalDateTime.with(Ljava/time/LocalDate;Ljava/time/LocalTime;)Ljava/time/LocalDateTime;+5 java.base@27-jep401ea2