Use stderr for debug prints in DEBUG(); fix
MODIFY
src/gc.c
src/gc.c
@@ -701,7 +701,7 @@ mrb_gc_mark(mrb_state *mrb, struct RBasic *obj)
static void
obj_free(mrb_state *mrb, struct RBasic *obj, int end)
{
- DEBUG(printf("obj_free(%p,tt=%d)\n",obj,obj->tt));
+ DEBUG(fprintf(stderr, "obj_free(%p,tt=%d)\n",obj,obj->tt));
switch (obj->tt) {
/* immediate - no mark */
case MRB_TT_TRUE:

MODIFY
src/vm.c
src/vm.c
@@ -1809,7 +1809,7 @@ RETRY_TRY_BLOCK:
return v;
}
pc = ci->pc;
- DEBUG(printf("from :%s\n", mrb_sym2name(mrb, ci->mid)));
+ DEBUG(fprintf(stderr, "from :%s\n", mrb_sym2name(mrb, ci->mid)));
proc = mrb->c->ci->proc;
irep = proc->body.irep;
pool = irep->pool;

Use stderr for debug prints in DEBUG(); fix #3584