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From: John Lumley <john@saxonica.com>
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Subject: Re: [SaxonJS - Bug #5338] XX Compiler reports "Unknown accumulator NNNNN" when an accumulator-before or -after call occurs in a global variable
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Date: Fri, 25 Feb 2022 22:22:02 +0000
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Message-Id: <DE500E88-F07D-463D-B8D0-61CC599984D5@saxonica.com>
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References: <redmine.journal-19674.20220225220338.68b7a5e15e582d41@plan.io>
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In-Reply-To: <redmine.journal-19674.20220225220338.68b7a5e15e582d41@plan.io>
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To: Saxonica Developer Community <inbox+saxonica+f38e+saxon-js@plan.io>
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When writing the code for the XX compiler, there are so many corner cases (m=
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any thousands of them?) that might need to be satisfied that it=E2=80=99s pr=
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etty much impossible to cover them all. In this case during the XPath compil=
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ing of global variables, rather than other declarations, such as templates, I=
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neglected to add the tunnelled variable defining in-scope accumulators, hen=
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ce the error.
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Unfortunately none of the then XSLT test suite cases covered reference to an=
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accumulator in a global variable=E2=80=A6. hence the failure. These cases h=
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appen, but as Michael says, some of them are very rarely used in practice=E2=
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=80=A6 That=E2=80=99s why reporting these to the Saxonica forum is so helpfu=
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l!
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Sent from my iPad
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> On 25 Feb 2022, at 22:03, Saxonica Developer Community <notifications@plan=
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.io> wrote:
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>=20
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> Please keep reporting them! My commentary wasn't based on any thought no-o=
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ne should be doing this, but more on thinking "why is it that no-one has fou=
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nd this bug before? What are they doing that other people aren't doing?"
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.