Re: Whose error is it anyway

What's on line 67? Is it the declaration of global variable $actions? Otherwise, I can't see why evaluating this pattern should result in a call on xsl:element.

Michael Kay
Saxonica

> On 14 Aug 2020, at 13:04, Ihe Onwuka <[email protected]> wrote:
> 
> Happened again. 
> 
> My code. <xsl:template match="*[map:contains($actions,tokenize(.,'\W')[1][matches(.,'\i\c*')])]">
> 
> Clearly it doesn't like the zero length string.
> 
> Warning at char 1 in xsl:template/@match on line 63 column 92 of *****.xsl:
>   XPTY0004  An error occurred matching pattern
>   {element()[Q{http://www.w3.org/2005/xpath-functions/map}contains($actions <http://www.w3.org/2005/xpath-functions/map%7Dcontains($actions>,
>   exactly-one((first(tokenize(convertUntyped(data(.)), "\W", "")))[matches(., "\i\c*", "")]))]}:
> Error at char 9 in expression in xsl:element/@name on line 67 column 55 of ******.xsl:
>   XTDE0820  Supplied element name is a zero-length string
> 
> On Thu, Aug 13, 2020 at 6:40 PM Ihe Onwuka <[email protected] <mailto:[email protected]>> wrote:
> I tried but cannot reconstruct a snippet that reproduces. The hint as to what happened in my use case was the best I could offer.
> 
> On Thu, Aug 13, 2020 at 6:15 PM Michael Kay <mike-JkSD5nQpfvpWk0Htik3J/[email protected] <mailto:mike-JkSD5nQpfvpWk0Htik3J/[email protected]>> wrote:
> If you post a repro that we can run, that's useful as we can examine the error messages, see what's causing them, and test any improvements. With only snippets like this, there's not really any effective action we can take.
> 
> Michael Kay
> Saxonica
> 
>> On 13 Aug 2020, at 18:53, Ihe Onwuka <[email protected] <mailto:[email protected]>> wrote:
>> 
>> I can tell you that the error went away when I eliminated the possibility of the context element being empty. I struggle to correlate that back to the error message that was displayed. 
>> 
>> On Thu, Aug 13, 2020 at 10:16 AM Graydon <[email protected] <mailto:[email protected]>> wrote:
>> Both?  The hints about what the optimizer thinks is happening are useful right up until I can't tell where the error is.
>> 
>> On August 13, 2020 1:40:48 PM UTC, Michael Kay <mike-JkSD5nQpfvpWk0Htik3J/[email protected] <mailto:mike-JkSD5nQpfvpWk0Htik3J/[email protected]>> wrote:
>> >Yes, we should probably retain the original pattern as a string rather
>> >than trying to reconstitute it from the compiled form.
>> >
>> >Michael Kay
>> >Saxonica
>> >
>> >> On 13 Aug 2020, at 13:52, Ihe Onwuka <[email protected] <mailto:[email protected]>> wrote:
>> >> 
>> >> This is not my code. 
>> >> 
>> >> Warning at char 1 in xsl:template/@match on line 62 column 72 of
>> >******.xsl:
>> >>   XPTY0004  An error occurred matching pattern
>> >>  
>> >{element()[Q{http://www.w3.org/2005/xpath-functions/map}contains($actions <http://www.w3.org/2005/xpath-functions/map%7Dcontains($actions>
>> ><http://www.w3.org/2005/xpath-functions/map%7Dcontains($actions <http://www.w3.org/2005/xpath-functions/map%7Dcontains($actions>>,
>> >>   exactly-one(first(tokenize(convertUntyped(data(.)), "\s", ""))))]}:
>> >> 
>> >> My code was
>> >> 
>> >> 
>> >>    <xsl:template
>> >match="*[map:contains($actions,tokenize(.,'\s')[1])]">
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