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https://issues.apache.org/jira/browse/DAFFODIL-2553?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Steve Lawrence resolved DAFFODIL-2553.
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Fix Version/s: 3.2.0
Resolution: Fixed
Fixed in commit ae9ebd391aacad320917b60a34936a066acd072e
> dfdl:occursCountKind aborts with invalid path expression to array
> -----------------------------------------------------------------
>
> Key: DAFFODIL-2553
> URL: https://issues.apache.org/jira/browse/DAFFODIL-2553
> Project: Daffodil
> Issue Type: Bug
> Components: Front End
> Affects Versions: 2.4.0
> Reporter: Steve Lawrence
> Assignee: Steve Lawrence
> Priority: Major
> Fix For: 3.2.0
>
>
> This invalid schema causes an abort when trying to compile:
> {code:xml}
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema
> xmlns:xs="http://www.w3.org/2001/XMLSchema";
> xmlns:dfdl="http://www.ogf.org/dfdl/dfdl-1.0/";>
>
> <xs:include
> schemaLocation="org/apache/daffodil/xsd/DFDLGeneralFormat.dfdl.xsd"/>
>
> <xs:annotation>
> <xs:appinfo source="http://www.ogf.org/dfdl/";>
> <dfdl:format ref="GeneralFormat" lengthKind="delimited" />
> </xs:appinfo>
> </xs:annotation>
> <xs:element name="root">
> <xs:complexType>
> <xs:sequence>
> <xs:element name="arr1" maxOccurs="unbounded">
> <xs:complexType>
> <xs:sequence>
> <xs:element name="field1" type="xs:string" />
> </xs:sequence>
> </xs:complexType>
> </xs:element>
> <xs:element name="arr2" type="xs:string" maxOccurs="unbounded"
> dfdl:occursCountKind="expression"
> dfdl:occursCount="{ xs:unsignedLong(../arr1[DNE]/field1) }" />
> </xs:sequence>
> </xs:complexType>
> </xs:element>
> </xs:schema>
> {code}
> The dfdl:occursCount expression has an invalid path--the DNE index step does
> not exist. But instead of getting a helpful error message, we get this abort
> when compiling:
> {code}
> org.apache.daffodil.exceptions.Abort: Invariant broken:
> RelativePathExpression.this.steps2.apply(0).isInstanceOf[org.apache.daffodil.dpath.Up]
> org.apache.daffodil.exceptions.Assert$.abort(Assert.scala:137)
> org.apache.daffodil.dpath.RelativePathExpression.adjustedSteps$lzycompute(Expression.scala:820)
> org.apache.daffodil.dpath.RelativePathExpression.adjustedSteps(Expression.scala:813)
> org.apache.daffodil.dpath.RelativePathExpression.compiledDPath$lzycompute(Expression.scala:827)
> at org.apache.daffodil.exceptions.Assert$.abort(Assert.scala:137)
> at
> org.apache.daffodil.dpath.RelativePathExpression.adjustedSteps$lzycompute(Expression.scala:820)
> at
> org.apache.daffodil.dpath.RelativePathExpression.adjustedSteps(Expression.scala:813)
> at
> org.apache.daffodil.dpath.RelativePathExpression.compiledDPath$lzycompute(Expression.scala:827)
> at
> org.apache.daffodil.dpath.RelativePathExpression.compiledDPath(Expression.scala:826)
> at
> org.apache.daffodil.dpath.PredicateExpression.compiledDPath$lzycompute(Expression.scala:1294)
> at
> org.apache.daffodil.dpath.PredicateExpression.compiledDPath(Expression.scala:1294)
> at
> org.apache.daffodil.dpath.NamedStep.downwardStep$lzycompute(Expression.scala:1181)
> at
> org.apache.daffodil.dpath.NamedStep.downwardStep(Expression.scala:1176)
> at
> org.apache.daffodil.dpath.NamedStep.compiledDPath$lzycompute(Expression.scala:1167)
> at
> org.apache.daffodil.dpath.NamedStep.compiledDPath(Expression.scala:1166)
> at
> org.apache.daffodil.dpath.RelativePathExpression.$anonfun$compiledDPath$3(Expression.scala:828)
> ...
> {code}
> This seems to be specific to the {{dfdl:occursCount}} expression. We should
> get an error about invalid path step "DNE".
> I've tested this same bad expression with dfdl:inputValueCalc and
> dfdl:length, and get an appropriate error message. Changing {{DNE}} to {{1}}
> also allows the schema compile.
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