Re: [xml] Core while parsing

[Daniel Veillard <veillard redhat com>]

On Fri, Nov 19, 2004 at 09:57:08AM +0100, Volker Roth wrote:
> I have tested it with
> Libxml2 2.6.7, 2.6.14 and 2.6.16
[...]
> <rtc> Read from unallocated (rua):
> Attempting to read 4 bytes at address 0xc in page zero
> =>[1] vfprintf(0x0, 0x2b53a8, 0xffbfe77c, 0x1, 0x0, 0xffbfe730), at
> 0xf3587734
>   [2] xmlGenericErrorDefaultFunc(ctx = (nil), msg = 0x2b53a8 "%s:%d: ",
> ...), line 73 in "error.c"

I cannot reconciliate your trace with the actual code of the function:

/**
 * xmlGenericErrorDefaultFunc:
 * @ctx:  an error context
 * @msg:  the message to display/transmit
 * @...:  extra parameters for the message display
 *
 * Default handler for out of context error messages.
 */
void
xmlGenericErrorDefaultFunc(void *ctx ATTRIBUTE_UNUSED, const char *msg, ...) {
    va_list args;
                                                                                
    if (xmlGenericErrorContext == NULL)
        xmlGenericErrorContext = (void *) stderr;
                                                                                
    va_start(args, msg);
    vfprintf((FILE *)xmlGenericErrorContext, msg, args);
    va_end(args);
}

  ctx passed is NULL, no big deal we do not use it.
Then vfprintf is called on a NULL file while it explicitely check and
correct if xmlGenericErrorContext is NULL to use stderr. If your stderr
is NULL, well I don't know what you did but this sounds awfully broken.

Daniel

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veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
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