gnu_java_math_GMP.c:1135:13: error: this statement may fall through [-Werror=implicit-fallthrough=]
res = mpz_popcount (_this);
~~~~^~~~~~~~~~~~~~~~~~~~~~
gnu_java_math_GMP.c:1136:7: note: here
default:
^~~~~~~
Signed-off-by: Guo Li <uxgood.org@gmail.com>