dirty_MUT_VAR(StgRegTable *reg, StgClosure *p)
{
Capability *cap = regTableToCapability(reg);
+ bdescr *bd;
if (p->header.info == &stg_MUT_VAR_CLEAN_info) {
p->header.info = &stg_MUT_VAR_DIRTY_info;
- recordMutableCap(p,cap,Bdescr(p)->gen_no);
+ bd = Bdescr(p);
+ if (bd->gen_no > 0) recordMutableCap(p,cap,bd->gen_no);
}
}