279276 - XSL(T) errors should be more verbose

Status: NEW

(Core :: XSLT, enhancement)

Description

[Philip Withnall (unavailable)]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8a6) Gecko/20041221 Firefox/1.0+
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8a6) Gecko/20041221 Firefox/1.0+

When Gecko encounters an error in an XSL(T) stylesheet for an XML file, it
should give a more verbose and informative error message (as it does if it finds
an error in an XML file) instead of just saying that the was an error.

Reproducible: Always

Steps to Reproduce:
1. Create a perfect XML document, and in it, reference an imperfect XSL(T)
stylesheet
2. View the XML document in Firefox/Mozilla
3. Spend hours trying to work out what's wrong with your XSL(T)

Actual Results:  
I spent ages trying to find out what was wrong with my XSL(T)

Expected Results:  
I should be able to pinpoint the error easily courtesy of a verbose error message

Comment 1

[Gervase Markham [:gerv]]

This is an automated message, with ID "auto-resolve01".

This bug has had no comments for a long time. Statistically, we have found that
bug reports that have not been confirmed by a second user after three months are
highly unlikely to be the source of a fix to the code.

While your input is very important to us, our resources are limited and so we
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Comment 2

[Philip Withnall (unavailable)]

This is the behaviour in Firefox 1.0.7 :-P

Comment 3

[Philip Withnall (unavailable)]

Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9a1) Gecko/20060214 Firefox/1.6a1
This is still happening in the latest build.

Compare a typical XML error message:
XML Parsing Error: mismatched tag. Expected: </xsl:stylesheet>.
Location: file:///var/www/Example-pages/Syn-JS/syn-js.xsl
Line Number 24, Column 4:
	</xsl:template>
----------^

With a typical XSLT error message:
Error during XSLT transformation: (null)

Comment 4

[Peter Van der Beken [:peterv]]

*** Bug 316319 has been marked as a duplicate of this bug. ***

Comment 5

[Chris Kaye]

I agree. All I get from 2.0.0.1 is "Error during XSLT transformation: An unknown XPath extension function was called." which isn't a lot of help!

Comment 6

[Peter Schut]

Agreed.  XSLT debugging if Firefox is not easy.