Bug #4653: fn:fold-left with inline function in SaxonJS.XPath.evaluate - SaxonJS - Saxonica Developer Community

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Bug #4653

closed

fn:fold-left with inline function in SaxonJS.XPath.evaluate

Added by Debbie Lockett over 4 years ago. Updated almost 4 years ago.

Status:

Duplicate

Priority:

Normal

Assignee:

Debbie Lockett

Category:

Sprint/Milestone:

Start date:

2020-07-24

Due date:

% Done:

Estimated time:

Applies to JS Branch:

Fix Committed on JS Branch:

Fixed in JS Release:

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Description

As raised by Martin Honnen on the forum (https://saxonica.plan.io/boards/5/topics/7958), there is an issue running SaxonJS.XPath.evaluate on an expression which calls fold-left. For example:

SaxonJS.XPath.evaluate(`  fold-left(
    1 to 10,
    0,
    function($sum, $number) {
      $sum + $number
    }
  )`)

Results in "TypeError: this.closureContext.localVars.slice is not a function" on Node.js, and "Uncaught TypeError: this.fl.Ha.slice is not a function" in the browser.

The bug has been reproduced running Saxon-JS 2.0. Actually the problem does not arise when running against the current development builds, so it looks like other development work has already fixed the issue, but opening this bug to log properly.

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Updated by Debbie Lockett over 4 years ago

I've added test 'xp-032' to the SaxonJS2-API-tests Mocha test suite, which runs the QT3 test case fold-left-001 expression 'fold-left(1 to 5, 0, function($a, $b) { $a + $b })' in SaxonJS.XPath.evaluate().

Running with SaxonJS2.debug.js produces a more informative stack trace:

TypeError: this.closureContext.localVars.slice is not a function
    at $$InlineFunction$$$$evaluate$ [as evaluate] (SaxonJS2N.debug.js:3914:70)
    at $$CoercedFunction$$$$evaluate$ [as evaluate] (SaxonJS2N.debug.js:3952:30)
    at SaxonJS2N.debug.js:9729:29
    at Array.forEach (<anonymous>)
    at $foldFn$$ (SaxonJS2N.debug.js:9728:28)
    at fold-left (SaxonJS2N.debug.js:10075:12)
    at SaxonJS2N.debug.js:12672:14
    at Object.$$evaluate$$$ [as evaluate] (SaxonJS2N.debug.js:13566:33)
    at Object.evaluate (SaxonJS2N.debug.js:21687:47)
    at Context.<anonymous> (test/SaxonJS2-API-tests.js:1934:31)
    at processImmediate (internal/timers.js:439:21)

Perhaps there have been development changes relating to CoercedFunction or InlineFunction since the 2.0 release...?

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Updated by Debbie Lockett about 4 years ago

Status changed from New to In Progress

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Updated by Debbie Lockett about 4 years ago

Status changed from In Progress to Duplicate
Fix Committed on JS Branch 2.0 added

The problem is the same as Bug #4611: XPath expression "function(){'x'}()" crashes with TypeError: this.closureContext.localVars.slice is not a function. So it is the fix for that bug which means that test 'xp-032' in SaxonJS2-API-tests now passes on the trunk branch.

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Updated by Debbie Lockett about 4 years ago

Related to Bug #4611: XPath expression "function(){'x'}()" crashes with TypeError: this.closureContext.localVars.slice is not a function added

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Updated by Debbie Lockett about 4 years ago

Related to deleted (Bug #4611: XPath expression "function(){'x'}()" crashes with TypeError: this.closureContext.localVars.slice is not a function)

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Updated by Debbie Lockett about 4 years ago

Is duplicate of Bug #4611: XPath expression "function(){'x'}()" crashes with TypeError: this.closureContext.localVars.slice is not a function added

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