String.compareTo is an intrinsics and commonly generated by C2.
JVM may crash in the AVX2 version of MacroAssembler::string_compare. A classic crashsite is as follows.
 
# J 1456 C2 java.lang.String.compareTo(Ljava/lang/Object;)I (9 bytes) @ 0x00007ffb0d830235 [0x00007ffb0d830160+0xd5]

broken instruction:
 vmovdqu ymm0, ymmword ptr [rdi + rax*2] <-- 0x00007ffb0d830235

RAX=0xffffffff00000036 indicates that it has been corrupted.

We also observed the same problem in # J 9048 C2 google.common.collect.RegularImmutableSortedSet.contains(Ljava/lang/Object;)Z (21 bytes).

This problem is hard to reproduce.