RUBY_ASSERT_MESG_WHEN   33 ruby_assert.h  #define RUBY_ASSERT(expr) RUBY_ASSERT_MESG_WHEN(!RUBY_NDEBUG+0, expr, #expr)
RUBY_ASSERT_MESG_WHEN   34 ruby_assert.h  #define RUBY_ASSERT_WHEN(cond, expr) RUBY_ASSERT_MESG_WHEN(cond, expr, #expr)