Re: [xml] xmllint --shell dumps core

[Justin Fletcher <justin fletcher ntlworld com>]

In message <3BE91D72 8070800 wiredminds de>
          Heiko Rupp <heiko rupp WiredMinds de> wrote:

> Input file:
>
> <personen>
>    <person name="foo">
>         <street>...</street>
>    </person>
>    <person name="bar">
>         <street>...</street>
>    </person>
> </personen>
>
>
>
> $ xmllint --shell
>
> / > cd /personen
> /personen is a 0 Node Set
> / > cd /personen/person
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x4006c493 in xmlShell (doc=0x806cab8, filename=0xbffff9a2 "table.xml",
>      input=0x8049e10 <xmlShellReadline>, output=0x402095e0) at
> debugXML.c:2113
> 2113                                if (list->nodesetval->nodeNr == 1) {
> (gdb) p list
> $1 = 0x805d410
> (gdb) p *list
> $2 = {type = XPATH_NODESET, nodesetval = 0x0, boolval = 0, floatval = 0,
>    stringval = 0x0, user = 0x0, index = 0, user2 = 0x0, index2 = 0}
> (gdb) bt
> #0  0x4006c493 in xmlShell (doc=0x806cab8, filename=0xbffff9a2 "table.xml",
>      input=0x8049e10 <xmlShellReadline>, output=0x402095e0) at
> debugXML.c:2113
> #1  0x804a52d in parseAndPrintFile (filename=0xbffff9a2 "table.xml")
>      at xmllint.c:624
> #2  0x804b81b in main (argc=3, argv=0xbffff7ec) at xmllint.c:1072
> #3  0x40110c6f in __libc_start_main () from /lib/libc.so.6
> (gdb) q
>
>
> Same happens for
>
> cd /personen/person[ name="bar"]
>
>
> The attached diff (against 2.4.8) prevents the core dump, but is
> certainly not the correct solution.

No abort occurs here, but I do get a silly response when I typo'd :

*  xmllint -shell test.xml
/ > cd /personen
personen > cd personen/person
personen/person is a -442502132 Node Set
personen >

-442502132 = 0xe59ff40c = value stored in address 0x0 through to 0x18,
therefore I believe a NULL dereference is taking place, which agrees
with the diff you sent.

[This test run with 2.4.9]

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