hi Dave： I have been gdb before， vl(pm->pcap_data) = 2,806,013,189， pm->n_pcap_data_written = 0. int is 32 bits,size_t is 64 bits. n=0xA740 5D05 cast to size_t is 0xFFFF FFFF A740 5D05. we can't use n for write param.
code fragment： int n = vec_len (pm->pcap_data) - pm->n_pcap_data_written; n = write (pm->file_descriptor, vec_elt_at_index (pm->pcap_data, pm->n_pcap_data_written), n);
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