Reintroduce `mrb_static_assert`; #5051

Note that the home brew version of `mrb_static_assert` only works within
the function body.  This reverts commit 8f99689.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/gc.c b/src/gc.c
index 64e0b3eae..be812c4d3 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -1619,6 +1619,9 @@ mrb_init_gc(mrb_state *mrb)
 {
   struct RClass *gc;
 
+  mrb_static_assert(sizeof(RVALUE) <= sizeof(void*) * 6,
+                    "RVALUE size must be within 6 words");
+
   gc = mrb_define_module(mrb, "GC");
 
   mrb_define_class_method(mrb, gc, "start", gc_start, MRB_ARGS_NONE());