這個錯誤提示什麼？

Question

當我試圖執行這樣我的程序它得到錯誤 -

sendip: malloc.c:4631: _int_malloc: Assertion `(unsigned long)(size) 
>= (unsigned long)(nb)' failed 

試圖通過Valgrind的捕獲錯誤，有這個一個 -

HEAP SUMMARY: 
    ==3335==  in use at exit: 24 bytes in 2 blocks 
    ==3335== total heap usage: 111 allocs, 109 frees, 7,929 bytes allocated 
    ==3335== 
    ==3335== 4 bytes in 1 blocks are definitely lost in loss record 1 of 2 
    ==3335== at 0x40268A4: malloc (vg_replace_malloc.c:236) 
    ==3335== by 0x8049EEF: main (sendip.c:435) 
    ==3335== 
    ==3335== 20 bytes in 1 blocks are definitely lost in loss record 2 of 2 
    ==3335== at 0x40268A4: malloc (vg_replace_malloc.c:236) 
    ==3335== by 0x4031F57: ??? 
    ==3335== by 0x804A338: main (sendip.c:521) 
    ==3335== 

線沒有。 435

   datalen = stringargument(gnuoptarg, &datarg); 
     /*This is the line*/ data=(char *)malloc(datalen); 
          memcpy(data, datarg, datalen); 

如果需要，我可以添加其他代碼段......但幫助我擺脫這種？這是什麼，我不知道..

Answer 1

你必須覆蓋「數據」，並忘記釋放舊的內容...你檢查過嗎？