This is a similar problem to that fixed in https://gerrit.wikimedia.org/r/c/mediawiki/extensions/WikiLambda/+/817833/. Also, if this problem has to do with where local and global keys are supported, T315009 might be related.
**Steps to replicate the issue** (include links if applicable):
* Arrange to log the exception caught at this line in ApiPerformTest.php::executeFunctionCall
} catch ( \Exception $exception ) {
* Running the current WikiLambda system (with orchestrator running), visit http://localhost:8080/wiki/Z801?view=zobject-viewer
* Observe the exceptions logged (**also, they are copied below**)
**What happens?**:
The page loaded above runs 4 testers; i.e. 8 calls to executeFunctionCall. The 7th and 8th of these calls (which correspond to the last, failing test) cause exceptions to be raised from ZObjectFactory::create().
(Note: As of 2022 Sept. 9, all 4 of the testers are failing on beta, whereas only the 4th is failing in my local environment. Don't know why we have this discrepancy.)
**What should have happened instead?**:
No exceptions
**Exception logged for the 7th (test run) call:**
MediaWiki\Extension\WikiLambda\ZErrorException: Key value not wellformed in /var/www/html/w/extensions/WikiLambda/includes/ZObjectFactory.php:405
Stack trace:
#0 /var/www/html/w/extensions/WikiLambda/includes/ZObjectFactory.php(314): MediaWiki\Extension\WikiLambda\ZObjectFactory::createKeyValues(Array, 'ZResponseEnvelo...')
#1 /var/www/html/w/extensions/WikiLambda/includes/ZObjectFactory.php(205): MediaWiki\Extension\WikiLambda\ZObjectFactory::createChild(Object(stdClass))
#2 /var/www/html/w/extensions/WikiLambda/includes/API/ApiPerformTest.php(241): MediaWiki\Extension\WikiLambda\ZObjectFactory::create(Object(stdClass))
#3 /var/www/html/w/extensions/WikiLambda/includes/API/ApiPerformTest.php(145): MediaWiki\Extension\WikiLambda\API\ApiPerformTest->executeFunctionCall(Object(MediaWiki\Extension\WikiLambda\ZObjects\ZFunctionCall), true)
#4 /var/www/html/w/extensions/WikiLambda/includes/API/ApiPerformTest.php(56): MediaWiki\Extension\WikiLambda\API\ApiPerformTest->run()
#5 /var/www/html/w/includes/api/ApiMain.php(1901): MediaWiki\Extension\WikiLambda\API\ApiPerformTest->execute()
#6 /var/www/html/w/includes/api/ApiMain.php(875): ApiMain->executeAction()
#7 /var/www/html/w/includes/api/ApiMain.php(846): ApiMain->executeActionWithErrorHandling()
#8 /var/www/html/w/api.php(90): ApiMain->execute()
#9 /var/www/html/w/api.php(45): wfApiMain()
#10 {main}
**Exception logged for the 8th (validation run) call:**
MediaWiki\Extension\WikiLambda\ZErrorException: Not wellformed in /var/www/html/w/extensions/WikiLambda/includes/ZObjectFactory.php:201
Stack trace:
#0 /var/www/html/w/extensions/WikiLambda/includes/API/ApiPerformTest.php(241): MediaWiki\Extension\WikiLambda\ZObjectFactory::create(Object(stdClass))
#1 /var/www/html/w/extensions/WikiLambda/includes/API/ApiPerformTest.php(161): MediaWiki\Extension\WikiLambda\API\ApiPerformTest->executeFunctionCall(Object(MediaWiki\Extension\WikiLambda\ZObjects\ZFunctionCall), false)
#2 /var/www/html/w/extensions/WikiLambda/includes/API/ApiPerformTest.php(56): MediaWiki\Extension\WikiLambda\API\ApiPerformTest->run()
#3 /var/www/html/w/includes/api/ApiMain.php(1901): MediaWiki\Extension\WikiLambda\API\ApiPerformTest->execute()
#4 /var/www/html/w/includes/api/ApiMain.php(875): ApiMain->executeAction()
#5 /var/www/html/w/includes/api/ApiMain.php(846): ApiMain->executeActionWithErrorHandling()
#6 /var/www/html/w/api.php(90): ApiMain->execute()
#7 /var/www/html/w/api.php(45): wfApiMain()
#8 {main}
**$responseObject passed from (the test run call to) executeFunctionCall to ZObjectFactory::create():**
stdClass Object
(
[Z1K1] => Z22
[Z22K1] => Z24
[Z22K2] => stdClass Object
(
[Z1K1] => stdClass Object
(
[Z1K1] => Z7
[Z7K1] => Z883
[Z883K1] => Z6
[Z883K2] => Z1
)
[K1] => Array
(
[0] => stdClass Object
(
[Z1K1] => Z7
[Z7K1] => Z882
[Z882K1] => Z6
[Z882K2] => Z1
)
[1] => stdClass Object
(
[Z1K1] => stdClass Object
(
[Z1K1] => Z7
[Z7K1] => Z882
[Z882K1] => Z6
[Z882K2] => Z1
)
[K1] => errors
[K2] => stdClass Object
(
[Z1K1] => Z5
[Z5K1] => stdClass Object
(
[Z1K1] => Z507
[Z507K1] => Could not find argument Z801K1.
)
)
)
[2] => stdClass Object
(
[Z1K1] => stdClass Object
(
[Z1K1] => Z7
[Z7K1] => Z882
[Z882K1] => Z6
[Z882K2] => Z1
)
[K1] => orchestrationMemoryUsage
[K2] => 166.93 MiB
)
[3] => stdClass Object
(
[Z1K1] => stdClass Object
(
[Z1K1] => Z7
[Z7K1] => Z882
[Z882K1] => Z6
[Z882K2] => Z1
)
[K1] => orchestrationCpuUsage
[K2] => 322.783 ms
)
[4] => stdClass Object
(
[Z1K1] => stdClass Object
(
[Z1K1] => Z7
[Z7K1] => Z882
[Z882K1] => Z6
[Z882K2] => Z1
)
[K1] => orchestrationStartTime
[K2] => 2022-08-04T23:12:36.655Z
)
[5] => stdClass Object
(
[Z1K1] => stdClass Object
(
[Z1K1] => Z7
[Z7K1] => Z882
[Z882K1] => Z6
[Z882K2] => Z1
)
[K1] => orchestrationEndTime
[K2] => 2022-08-04T23:12:36.900Z
)
[6] => stdClass Object
(
[Z1K1] => stdClass Object
(
[Z1K1] => Z7
[Z7K1] => Z882
[Z882K1] => Z6
[Z882K2] => Z1
)
[K1] => orchestrationDuration
[K2] => 245 ms
)
)
)
)
**The $responseObject of the validation run is too large to copy here. It's in normal form.**