Bug #4556: UnsupportedOperationException on Saxon 10.1 - Saxon - Saxonica Developer Community

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Bug #4556

closed

UnsupportedOperationException on Saxon 10.1

Added by Gunther Rademacher over 4 years ago. Updated about 4 years ago.

Status:

Closed

Priority:

Normal

Assignee:

Michael Kay

Category:

Internals

Sprint/Milestone:

Start date:

2020-05-16

Due date:

% Done:

100%

Estimated time:

Legacy ID:

Applies to branch:

Fix Committed on Branch:

Fixed in Maintenance Release:

10.2

Platforms:

Description

After upgrading from 10.0 to 10.1, I am facing a

java.lang.RuntimeException: Internal error evaluating function ...

where the root cause is an UnsupportedOperationException with this stacktrace:

java.lang.UnsupportedOperationException
        at net.sf.saxon.value.UntypedAtomicValue.copyAsSubType(UntypedAtomicValue.java:46)
        at net.sf.saxon.type.Converter$UpCastingConverter.convert(Converter.java:188)
        at net.sf.saxon.type.Converter$UpCastingConverter.convert(Converter.java:180)
        at net.sf.saxon.expr.CastExpression.doCast(CastExpression.java:376)
        at net.sf.saxon.expr.CastExpression.evaluateItem(CastExpression.java:395)
        at net.sf.saxon.expr.CastExpression.evaluateItem(CastExpression.java:30)
        at net.sf.saxon.expr.ValueComparison.effectiveBooleanValue(ValueComparison.java:347)
        at net.sf.saxon.expr.FilterIterator$NonNumeric.matches(FilterIterator.java:177)
        at net.sf.saxon.expr.FilterIterator.getNextMatchingItem(FilterIterator.java:76)
        at net.sf.saxon.expr.FilterIterator.next(FilterIterator.java:62)
        at net.sf.saxon.tree.iter.UntypedAtomizingIterator.next(UntypedAtomizingIterator.java:44)
        at net.sf.saxon.tree.iter.UntypedAtomizingIterator.next(UntypedAtomizingIterator.java:27)
        at net.sf.saxon.om.MemoSequence$ProgressiveIterator.next(MemoSequence.java:225)
        at net.sf.saxon.expr.parser.ExpressionTool.effectiveBooleanValue(ExpressionTool.java:760)
        at net.sf.saxon.expr.Expression.effectiveBooleanValue(Expression.java:890)
        at net.sf.saxon.expr.instruct.Choose.choose(Choose.java:946)
        at net.sf.saxon.expr.instruct.Choose.iterate(Choose.java:996)
        at net.sf.saxon.expr.instruct.BlockIterator.next(BlockIterator.java:49)
        at net.sf.saxon.expr.CardinalityCheckingIterator.<init>(CardinalityCheckingIterator.java:51)
        at net.sf.saxon.expr.CardinalityChecker.iterate(CardinalityChecker.java:234)
        at net.sf.saxon.expr.LetExpression.iterate(LetExpression.java:519)
        at net.sf.saxon.value.MemoClosure.makeSequence(MemoClosure.java:86)
        at net.sf.saxon.value.MemoClosure.iterate(MemoClosure.java:80)
        at net.sf.saxon.expr.UserFunctionCall.iterate(UserFunctionCall.java:482)
        at net.sf.saxon.value.MemoClosure.makeSequence(MemoClosure.java:86)
        at net.sf.saxon.value.MemoClosure.iterate(MemoClosure.java:80)
        at net.sf.saxon.expr.VariableReference.iterate(VariableReference.java:555)
        at net.sf.saxon.expr.FirstItemExpression.evaluateItem(FirstItemExpression.java:112)
        at net.sf.saxon.expr.Expression.iterate(Expression.java:872)
        at net.sf.saxon.expr.Atomizer.iterate(Atomizer.java:359)
        at net.sf.saxon.expr.GeneralComparison.effectiveBooleanValue(GeneralComparison.java:646)
        at net.sf.saxon.expr.instruct.Choose.choose(Choose.java:946)
        at net.sf.saxon.expr.instruct.Choose.iterate(Choose.java:996)
        at net.sf.saxon.expr.LetExpression.iterate(LetExpression.java:519)
        at net.sf.saxon.expr.instruct.Choose.iterate(Choose.java:997)
        at net.sf.saxon.expr.instruct.Choose.iterate(Choose.java:997)
        at net.sf.saxon.value.MemoClosure.makeSequence(MemoClosure.java:86)
        at net.sf.saxon.value.MemoClosure.iterate(MemoClosure.java:80)
        at net.sf.saxon.expr.VariableReference.iterate(VariableReference.java:555)
        at net.sf.saxon.expr.FirstItemExpression.evaluateItem(FirstItemExpression.java:112)
        at net.sf.saxon.expr.Expression.iterate(Expression.java:872)
        at net.sf.saxon.expr.Atomizer.iterate(Atomizer.java:359)
        at net.sf.saxon.expr.GeneralComparison.effectiveBooleanValue(GeneralComparison.java:646)
        at net.sf.saxon.expr.AndExpression.effectiveBooleanValue(AndExpression.java:145)
        at net.sf.saxon.expr.AndExpression.effectiveBooleanValue(AndExpression.java:145)
        at net.sf.saxon.expr.AndExpression.effectiveBooleanValue(AndExpression.java:145)
        at net.sf.saxon.expr.AndExpression.effectiveBooleanValue(AndExpression.java:145)
        at net.sf.saxon.expr.AndExpression.effectiveBooleanValue(AndExpression.java:145)
        at net.sf.saxon.expr.AndExpression.effectiveBooleanValue(AndExpression.java:145)
        at net.sf.saxon.expr.instruct.Choose.choose(Choose.java:946)
        at net.sf.saxon.expr.instruct.Choose.iterate(Choose.java:996)
        at net.sf.saxon.expr.LetExpression.iterate(LetExpression.java:519)
        at net.sf.saxon.expr.instruct.Choose.iterate(Choose.java:997)
        at net.sf.saxon.expr.TailCallLoop.iterate(TailCallLoop.java:99)
        at net.sf.saxon.expr.parser.Evaluator$11.evaluate(Evaluator.java:290)
        at net.sf.saxon.expr.instruct.UserFunction.call(UserFunction.java:633)
        ... 231 more

Unfortunately I do not yet have a small reproduction for this, but I am working on it.

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bug4556.ebnf (725 Bytes) bug4556.ebnf		Gunther Rademacher, 2020-05-17 22:03
bug4556.xquery (32.9 KB) bug4556.xquery		Gunther Rademacher, 2020-05-17 22:03

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Updated by Gunther Rademacher over 4 years ago

File bug4556.xquery bug4556.xquery added
File bug4556.ebnf bug4556.ebnf added

This is reproducible with a REx parser for a small grammar (both attached), running from command line:

java net.sf.saxon.Query bug4556.xquery

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Updated by Michael Kay over 4 years ago

It's trying to cast an xs:untypedAtomic value to xs:anyAtomicType. Such a cast isn't allowed.

It appears to have been generated during rewriting of the predicate on line 998:

@key = $state[$p:e0] * 1 + $dpi]

The code for general comparisons generates a cast expression from UntypedAtomic (the type of @key) to the static type of the RHS, which in this case is xs:anyAtomicType.

The relevant code in GeneralComparison.optimize() is unchanged from 9.9, but for reasons I can't easily establish, it's not executed in the 9.9 case.

It seems that the static type analysis for the RHS expression has inferred a type of xs:numeric, and the cast is generated to the corresponding primitive type, which is xs:anyAtomicType.

The test NumericType.isNumericType() is returning false if the type is xs:numeric.

In 9.9 the code was th.isSubType(t1, NumericType.getInstance(), which would return true for any numeric type or for the union type xs:numeric itself.

I think NumericType.isNumericType() should return true for the union type, but it's a little bit hard to be sure that's what all callers expect.

Changing it fixes this test case and appears to cause no regression.

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Updated by Michael Kay over 4 years ago

The bug was introduced by the patch for bug #4508.

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Updated by Michael Kay over 4 years ago

Category set to Internals
Status changed from New to Resolved
Assignee set to Michael Kay
Priority changed from Low to Normal
Applies to branch 10 added
Fix Committed on Branch 10 added

Changing NumericType.isNumericType() to:

public static boolean isNumericType(ItemType type) {
        return type.isPlainType() &&
                UType.NUMERIC.subsumes(type.getUType());
    }

The second condition on its own would probably be fine, but this is extra safety.

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