Bug #2183: Bytecode generation: xs:string returns "" instead of () - Saxon - Saxonica Developer Community

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Bug #2183

closed

Bytecode generation: xs:string returns "" instead of ()

Added by Michael Kay about 10 years ago. Updated about 9 years ago.

Status:

Closed

Priority:

Normal

Assignee:

Michael Kay

Category:

XPath conformance

Sprint/Milestone:

9.6.0.2

Start date:

2014-10-15

Due date:

% Done:

100%

Estimated time:

Legacy ID:

Applies to branch:

9.6

Fix Committed on Branch:

9.6

Fixed in Maintenance Release:

9.6.0.2

Platforms:

Description

The generated bytecode for an expression such as xs:string(/a/b/c) returns a zero length string instead of an empty sequence when the supplied node-set is empty.

The problem is present in 9.6 and earlier releases.

I have written a number of new W3C QT3 test cases for value comparisons; the problem is revealed by test case value-comp-eq-string-4

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Updated by Michael Kay about 10 years ago

Status changed from New to Resolved

I have fixed this on the 9.5, 9.6, and 9.7 branches by a patch to AnyTypeToStringConverterCompiler.java

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Updated by Michael Kay about 10 years ago

Turns out the first patch solves the problem on the "compileToPrimitive" path but not on the "compileToItem" path in AnyTypeToStringConverterCompiler. The problem is revealed by the same test, run with option -unfolded. An additional patch is being applied to the same class.

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