Antipattern of just one token

Development
1

Should
<antipattern><token postag="UNKNOWN"/></antipattern>
not prevent the pattern to trigger when there is any amount of unknown words in it? It does not seem to do so.

2

As long as one of the unknown words is in the <pattern> (or was it in the <marker> inside the <pattern>?), I guess so. Can you provide a complete example that already as simple as possible?

3

Hmm. I can not reproduce it in the rule editor. I will check it again later.

4

This is an example for Dutch:

<rulegroup id="TESTJE" name="Testje">
    <rule>
        <antipattern><token postag="UNKNOWN"/></antipattern>
        <antipattern><token postag="SENT_START"/><token postag_regexp="yes" postag="BNW:STL:VRB|WKW:VTD:VRB"/>&ZnwEkvDe;<token postag="SENT_END" regexp="yes">[.!]</token></antipattern>
        <pattern><token postag="SENT_START"/><token postag_regexp="yes" postag="BNW:STL:VRB|WKW:VTD:VRB"/><marker><token postag_regexp="yes" postag="ZNW.*"/></marker><token postag="SENT_END" regexp="yes">[.!]</token></pattern>        
        <message>Hier wordt een de-woord verwacht.</message>
        <example type="incorrect">Goede <marker>restaurant</marker>!</example>
    </rule>
</rulegroup>

The output is:

Checking example sentences of 3496 rules for Dutch...
[ERROR] Tests run: 3, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 10.967 s <<< FAILURE! - in org.languagetool.rules.nl.DutchPatternRuleTest
[ERROR] testRules(org.languagetool.rules.nl.DutchPatternRuleTest)  Time elapsed: 10.681 s  <<< FAILURE!
java.lang.AssertionError: 
Dutch rule TESTJE[1]:
"Goede restaurant!"
Errors expected: 1
Errors found   : 0
Message: Hier wordt een de-woord verwacht.
Analyzed token readings: [/SENT_START*] Goede[Goede/ENM:PER:LST:NIX*,goed/BNW:STL:VRB*]  [ /null*] restaurant[restaurant/ZNW:EKV:HET] ![!/SENT_END*]

There is not one unknown token in the sentence, but still the antipattern is triggered.

5

Can you further simplify the rule, e.g. remove the second antipattern and expand the entities? This way it’s easier to test for a developer.

6 
<rule id="TESTJE" name="Testje">
    <antipattern><token postag="UNKNOWN"/></antipattern>
    <pattern><token postag="SENT_START"/><token>goed</token><marker><token>woord</token></marker><token postag="SENT_END" /></pattern>        
    <message>bla bla</message>
    <example type="incorrect">goed <marker>woord</marker>!</example>
</rule>
7

Could indeed be a bug. Feel free to open an issue, but it’s probably better to work around this using a <filter> if this happens more often. A developer could write one more easily then debugging this issue.

8

I will open a bug for the record. But there might be a workaround. I will look into that.