[ expat-Bugs-583114 ] 1.95.4 not backward compatible w 1.95.2

[noreply@sourceforge.net]

Bugs item #583114, was opened at 2002-07-17 18:35
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=110127&aid=583114&group_id=10127

Category: None
Group: None
Status: Open
>Resolution: Rejected
Priority: 5
Submitted By: Michel Rodriguez (mirod)
Assigned to: Nobody/Anonymous (nobody)
Summary: 1.95.4 not backward compatible w 1.95.2

Initial Comment:
When upgrading from 1.95.2 to 1.95.4 I found that the
behaviour of the library has changed: I can no longer
use a fake (non-existent) DTD to avoid entity
declaration errors.

I found the change using XML::Parser but I would think
it is caused by expat (it happened right after I
upgraded it):

perl -MXML::Parser -e'XML::Parser->new->parse( q{<?xml
version="1.0" standalone="no"?><!DOCTYPE doc SYSTEM
"dummy.dtd">
<doc>
  <elt1>toto &ent1;</elt1>
</doc>});'

gives no error using 1.95.2 but a "undefined entity at
line 3, column 13, byte 90" with 1.95.4

I know that trick is devious and certainly slightly
evil, but I found it quite useful ;--)

The new result might be the proper behaviour but it is
not documented (as far as I could tell) and it
certainly breaks compatibility


----------------------------------------------------------------------

>Comment By: Karl Waclawek (kwaclaw)
Date: 2002-07-17 19:46

Message:
Logged In: YES 
user_id=290026

Michel,

This change of behaviour is due to a bug fix.
Documentation for fixes can be found in the
associated bug and patch reports.

As a matter of fact, this specific fix is even mentioned
in the release notes for 1.95.4: 
Re-implemented WFC: Entity Declared from XML 1.0 spec ...

I am are aware that fixing bugs may introduce 
incompatibilities, but given the alternative of not fixing them ...

Anyway, if this is crucial to you, I recommend you do
not upgrade.

Karl

----------------------------------------------------------------------

Comment By: Michel Rodriguez (mirod)
Date: 2002-07-17 19:38

Message:
Logged In: YES 
user_id=72556

I think the bug is actually not due to the library but to
XML::Parser, or at least to XML::Parser's integration with
the library. xmlfw correctly reports that the document is OK
if standalone is set to "no", even with 1.95.4

I will have a look at XML::Parser::Expat but my C is really
rusty :--( 

Thanks

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=110127&aid=583114&group_id=10127