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https://issues.apache.org/jira/browse/DAFFODIL-2125?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Lawrence resolved DAFFODIL-2125.
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Resolution: Fixed
Fixed in commit 7e2ce3fb07545ac9bc15bf7580a15c32b1e5166a
> Incorrect unsparse with suspensions and changing bitOrder
> ---------------------------------------------------------
>
> Key: DAFFODIL-2125
> URL: https://issues.apache.org/jira/browse/DAFFODIL-2125
> Project: Daffodil
> Issue Type: Bug
> Components: Back End
> Affects Versions: 2.3.0
> Reporter: Brandon Sloane
> Assignee: Steve Lawrence
> Priority: Major
> Fix For: 2.4.0
>
> Attachments: input.bin, input.bin.xml, input.bin.xml.bin,
> schema.dfdl.xsd
>
>
> Full example attached demonstrating the round trip behaviour of
> schema.dfdl.xsd.
> Relevent schema is:
>
> {quote}<xs:sequence>
> <xs:element name="zero" type="xs:int" dfdl:length="8"
> dfdl:outputValueCalc="\{ ../body/zero }"
> dfdl:bitOrder="mostSignificantBitFirst" dfdl:byteOrder="bigEndian"
> />
> <xs:element name="body" dfdl:lengthKind="implicit">
> <xs:complexType>
> <xs:sequence>
> <xs:element name="a" type="xs:int" dfdl:length="4"/>
> <xs:element name="b" type="xs:int" dfdl:length="4"
> dfdl:outputValueCalc="\{ ../zero }"/>
> <xs:element name="zero" type="xs:int" dfdl:inputValueCalc="\{ 0 }"/>
> </xs:sequence>
> </xs:complexType>
> </xs:element>
> </xs:sequence>
> {quote}
> Note that there are 2 suspensions involved in unparsing the above. The first
> byte, and second nimble of the second byte both suspend until the last
> element is computed.
> Also note that the bit-order changes between byte 1 and 2.
>
> Given the input:
> {quote}<tns:root xmlns:tns="urn:example">
> <zero>0</zero>
> <body>
> <a>2</a>
> <b>0</b>
> <zero>0</zero>
> </body>
> </tns:root>
> {quote}
> We expect unparse to reproduce input.bin exactly:
> {quote}00 02
> {quote}
> But instead see:
> {quote}00 00
> {quote}
> As if something is clobbering the value of <a>
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