Bug in CampaignFeedService

[FW API]

Hello, 

we have encountered a probable bug in CampaignFeedService. We have send a 
request with a CONTAINS_ANY clause according to this documentation:
https://developers.google.com/adwords/api/docs/guides/feed-services-locations#filtering_location_extensions

- The operation apparently worked: The correct four locations are now 
listed with the campaign. 
- But the soap response contained a 
FunctionError.INVALID_NUMBER_OF_OPERANDS.

I'll append redacted soap log:


SOAP request:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"; 
xmlns:xsd="http://www.w3.org/2001/XMLSchema"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
    <soapenv:Header>
        <ns1:RequestHeader 
xmlns:ns1="https://adwords.google.com/api/adwords/cm/v201809"; 
soapenv:mustUnderstand="0">
            <ns1:clientCustomerId>9367243494</ns1:clientCustomerId>
            <ns1:developerToken>REDACTED</ns1:developerToken>
            <ns1:userAgent>REDACTED (AwApi-Java, AdWords-Axis/4.1.0, 
Common-Java/4.1.0, Axis/1.4, Java/1.8.0_181, maven, 
SelectorBuilder)</ns1:userAgent>
            <ns1:validateOnly>false</ns1:validateOnly>
            <ns1:partialFailure>false</ns1:partialFailure>
        </ns1:RequestHeader>
    </soapenv:Header>
    <soapenv:Body>
        <mutate xmlns="https://adwords.google.com/api/adwords/cm/v201809";>
            <operations>
                <operator>SET</operator>
                <operand>
                    <feedId>100969912</feedId>
                    <campaignId>2075545651</campaignId>
                    <matchingFunction>
                        
<functionString>CONTAINS_ANY(FeedAttribute[100969912,14],{"176","047","105","175"})</functionString>
                    </matchingFunction>
                    <placeholderTypes>7</placeholderTypes>
                </operand>
            </operations>
        </mutate>
    </soapenv:Body>
</soapenv:Envelope>

***********
2019-07-25 16:02:54,908  INFO RemoteCallLoggerDelegate: 
***********
SOAP response:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/";>
    <soap:Header>
        <ResponseHeader 
xmlns="https://adwords.google.com/api/adwords/cm/v201809";>
            <requestId>00058e81e1dbd3c00a3741472207bded</requestId>
            <serviceName>CampaignFeedService</serviceName>
            <methodName>mutate</methodName>
            <operations>1</operations>
            <responseTime>88</responseTime>
        </ResponseHeader>
    </soap:Header>
    <soap:Body>
        <soap:Fault>
            <faultcode>soap:Client</faultcode>
            <faultstring>[FunctionError.INVALID_NUMBER_OF_OPERANDS @ 
operations[0].operand.matchingFunction.rhsOperand]</faultstring>
            <detail>
                <ApiExceptionFault 
xmlns="https://adwords.google.com/api/adwords/cm/v201809";>
                    <message>[FunctionError.INVALID_NUMBER_OF_OPERANDS @ 
operations[0].operand.matchingFunction.rhsOperand]</message>
                    
<ApplicationException.Type>ApiException</ApplicationException.Type>
                    <errors 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xsi:type="FunctionError">
                        
<fieldPath>operations[0].operand.matchingFunction.rhsOperand</fieldPath>
                        <fieldPathElements>
                            <field>operations</field>
                            <index>0</index>
                        </fieldPathElements>
                        <fieldPathElements>
                            <field>operand</field>
                        </fieldPathElements>
                        <fieldPathElements>
                            <field>matchingFunction</field>
                        </fieldPathElements>
                        <fieldPathElements>
                            <field>rhsOperand</field>
                        </fieldPathElements>
                        <trigger/>
                        
<errorString>FunctionError.INVALID_NUMBER_OF_OPERANDS</errorString>
                        <ApiError.Type>FunctionError</ApiError.Type>
                        <reason>INVALID_NUMBER_OF_OPERANDS</reason>
                    </errors>
                </ApiExceptionFault>
            </detail>
        </soap:Fault>
    </soap:Body>
</soap:Envelope>

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