Here is my valgrind output that I don't understand: ==319842== Invalid write of size 1 ==319842== at 0x48436E4: mempcpy (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so) ==319842== by 0x50CD1D8: _IO_default_xsputn (genops.c:386) ==319842== by 0x50CD1D8: _IO_default_xsputn (genops.c:370) ==319842== by 0x50B227B: __vfprintf_internal (vfprintf-internal.c:1688) ==319842== by 0x50C0278: __vsprintf_internal (iovsprintf.c:95) ==319842== by 0x509D047: sprintf (sprintf.c:30) ==319842== by 0x10B88F: html_link_find (crawler.c:452) ==319842== by 0x10BD6F: html_parse (crawler.c:536) ==319842== by 0x10C2CB: check_multi_info (crawler.c:678) ==319842== by 0x10C3DA: event_cb (crawler.c:706) ==319842== by 0x10D828: crawler_init (crawler.c:1154) ==319842== by 0x10DAE8: main (crawler.c:1207) ==319842== Address 0xf107d18 is 0 bytes after a block of size 8,200 alloc'd ==319842== at 0x483B7F3: malloc (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so) ==319842== by 0x10B736: html_link_find (crawler.c:440) ==319842== by 0x10BD6F: html_parse (crawler.c:536) ==319842== by 0x10C2CB: check_multi_info (crawler.c:678) ==319842== by 0x10C3DA: event_cb (crawler.c:706) ==319842== by 0x10D828: crawler_init (crawler.c:1154) ==319842== by 0x10DAE8: main (crawler.c:1207) ==319842==
valgrind: m_mallocfree.c:305 (get_bszB_as_is): Assertion 'bszB_lo == bszB_hi' failed. valgrind: Heap block lo/hi size mismatch: lo = 8272, hi = 3625731377157460067. This is probably caused by your program erroneously writing past the end of a heap block and corrupting heap metadata. If you fix any invalid writes reported by Memcheck, this assertion failure will probably go away. Please try that before reporting this as a bug. The code this pertains to can be found at https://github.com/JamesRead5737/webcrawler Any help in understanding what this error means would be greatly appreciated. James Read
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