This readily manifests in 11u. It is obscured in HEAD JDK by disabled "return-type" warning (and changed ShouldNotReachHere/BREAKPOINT definition?) for Zero.
src/hotspot/cpu/zero/cppInterpreter_zero.cpp: In function intptr_t narrow(BasicType, intptr_t):
src/hotspot/share/utilities/breakpoint.hpp:43:32: warning: control reaches end of non-void function [-Wreturn-type]
#define BREAKPOINT ::breakpoint()
~~~~~~~~~~~~^~
src/hotspot/share/utilities/debug.hpp:130:3: note: in expansion of macro BREAKPOINT
BREAKPOINT; \
^~~~~~~~~~
src/hotspot/cpu/zero/cppInterpreter_zero.cpp:103:16: note: in expansion of macro ShouldNotReachHere
default : ShouldNotReachHere();
^~~~~~~~~~~~~~~~~~
cppInterpreter_zero.cpp was renamed to zeroInterpreter_zero.cpp by JDK-8239782.