diff --git a/includes/memhub.vp b/includes/memhub.vp
index 2d94ac0..9204c39 100644
--- a/includes/memhub.vp
+++ b/includes/memhub.vp
@@ -898,6 +898,16 @@ class MemBuddy(MemManager):
                     bvj: t.CUInt8T = (t.CUInt8T | t.CPtr)(t.CVoid(p + s + t.CUInt64T(bj3), t.CPtr))[0]
                     stdio.printf("%02X ", t.CUInt32T(bvj))
                     bj3 += 1
+                # 记录表上下文：该条前 3 + 后 3 的 {ptr,size}，推断越界块分配阶段
+                stdio.printf("\n记录上下文: ")
+                ci2: t.CInt = -3
+                while ci2 <= 3:
+                    idx2: t.CSizeT = t.CSizeT(t.CInt(i) + ci2)
+                    if idx2 < self._det_count:
+                        cip: t.CUInt64T = self._det_records[idx2 * 2]
+                        cis: t.CUInt64T = self._det_records[idx2 * 2 + 1]
+                        stdio.printf("[%d]ptr=%llu sz=%llu ", ci2, cip, cis & (free_flag - 1))
+                    ci2 += 1
                 stdio.printf("\n")
                 stdlib.exit(1)
             i += 1