Bug in Daffodil

[Roger L Costello]

With this input:

GENTEXT/FOO/TAS//

The following DFDL generates the dreaded "Left over data" error:

<xs:element name="GeneralTextInfo" minOccurs="0" dfdl:initiator="GENTEXT" 
dfdl:terminator="//">
    <xs:complexType>
        <xs:sequence dfdl:separator="/" dfdl:separatorPosition="prefix">
            <xs:element name="TextIndicator" minOccurs="0" nillable="true" 
type="non-zero-length-string" dfdl:lengthPattern="[A-Z ]+"/>
            <xs:element name="FreeText" minOccurs="0" nillable="true" 
type="non-zero-length-string" dfdl:lengthPattern="[A-Z]|([A-Z][/A-Z]*[A-Z])"/>
        </xs:sequence>
    </xs:complexType>
</xs:element>

If I reverse the regex for FreeText:

<xs:element name="GeneralTextInfo" minOccurs="0" dfdl:initiator="GENTEXT" 
dfdl:terminator="//">
    <xs:complexType>
        <xs:sequence dfdl:separator="/" dfdl:separatorPosition="prefix">
            <xs:element name="TextIndicator" minOccurs="0" nillable="true" 
type="non-zero-length-string" dfdl:lengthPattern="[A-Z ]+"/>
            <xs:element name="FreeText" minOccurs="0" nillable="true" 
type="non-zero-length-string" dfdl:lengthPattern="([A-Z][/A-Z]*[A-Z])|[A-Z]"/>
        </xs:sequence>
    </xs:complexType>
</xs:element>

Then the error goes away.

This seems like a bug in Daffodil. The order in which a regex OR clause is 
expressed should not matter.

/Roger