The assertion in the Label destructor fires on s390:
assert(is_bound() || is_unused()) failed: Label was never bound to a location, but it was used as a jmp target

Stack:
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x29d650] Label::~Label()+0x38
V [libjvm.so+0x4ade58] LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck*)+0x720
V [libjvm.so+0x485d40] LIR_OpTypeCheck::emit_code(LIR_Assembler*)+0x30
V [libjvm.so+0x497b66] LIR_Assembler::emit_lir_list(LIR_List*)+0xe6
V [libjvm.so+0x498802] LIR_Assembler::emit_code(BlockList*)+0x202

JCK-Tests:
api/java_util/StringJoiner