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Fix jl_gc_internal_obj_base_ptr #50231

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2 changes: 2 additions & 0 deletions src/gc.c
Original file line number Diff line number Diff line change
Expand Up @@ -4040,6 +4040,8 @@ JL_DLLEXPORT jl_value_t *jl_gc_internal_obj_base_ptr(void *p)
// offset within object
size_t off2 = (off - GC_PAGE_OFFSET);
size_t osize = meta->osize;
if (osize == 0)
return NULL;
off2 %= osize;
if (off - off2 + osize > GC_PAGE_SZ)
return NULL;
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