Take recent jdk/jdk, apply this patch:

diff -r b585d773ea0f src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp
--- a/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp Mon Feb 10 06:18:46 2020 +0100
+++ b/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp Tue Feb 11 09:32:11 2020 +0100
@@ -852,11 +852,11 @@
       return;
     }
 #endif
     assert(src->is_single_cpu(), "must match");
     if (src->type() == T_OBJECT) {
- __ verify_oop(src->as_register());
+ __ verify_oop(src->as_register(), "reg2reg 1");
     }
     move_regs(src->as_register(), dest->as_register());
 
   } else if (dest->is_double_cpu()) {
 #ifdef _LP64

...then run this in any folder (Maven project is not required!):

$ export JAVA_HOME=...
$ export PATH=$JAVA_HOME/bin:$PATH
$ MAVEN_OPTS="-XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions -XX:+UseShenandoahGC -XX:+VerifyOops" mvn verify

# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/home/shade/trunks/jdk-jdk/src/hotspot/cpu/x86/macroAssembler_x86.cpp:883), pid=13783, tid=13799
# fatal error: DEBUG MESSAGE: verify_oop: rax: reg2reg 1
#