Fix the memory leakage.

fujuntang

2021-09-17 97428da8d339d3d0c4d00aa328d76a32c7858412

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ipcrm -a
rm *.txt
./test_lostdata
sort -n c.txt  > c1.txt
sort -n p.txt  > p1.txt
diff -u p1.txt c1.txt