Maniphest T404092

Create try-catch and throw builtin functions to be able to test custom errors thrown by user code
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	gengh
	Sep 9 2025, 2:47 PM

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Jdforrester-WMF

Description

Description

Add builtin functions:

Z850 try-catch
Z851 throw

Completion checklist

Before closing this task, review one by one the checklist available here: https://www.mediawiki.org/wiki/Abstract_Wikipedia_team/Definition_of_Done#Back-end_Task/Bug_completion_checklist

Details

Related Changes in Gerrit:

	Subject	Repo	Branch	Lines +/-
	wikifunctions: Upgrade orchestrator from 2025-09-16-134119 to 2025-09-24-180530	operations/deployment-charts	master	+1 -1
	wikifunctions: Upgrade evaluators from 2025-09-16-190551 to 2025-09-24-083919	operations/deployment-charts	master	+2 -2
	Update function-schemata sub-module to HEAD (e23a73d)	mediawiki/extensions/WikiLambda	master	+1 -1

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Related Changes in GitLab:

	Title	Reference	Author	Source Branch	Dest Branch
	Update function-schemata sub-module to HEAD (e23a73d)	repos/abstract-wiki/wikifunctions/function-orchestrator!453	jforrester	sync-function-schemata	main
	Update function-schemata sub-module to HEAD (e23a73d)	repos/abstract-wiki/wikifunctions/function-evaluator!411	jforrester	sync-function-schemata	main
	Update function-schemata sub-module to HEAD (e23a73d)	repos/abstract-wiki/wikifunctions/wikilambda-cli!89	jforrester	sync-function-schemata	main
	definitions: add "is error type" and "get error" builtin functions, and identity keys to error types	repos/abstract-wiki/wikifunctions/function-schemata!273	gengh	T405114	main
	definitions: add try-catch and throw function definition and implementation	repos/abstract-wiki/wikifunctions/function-schemata!272	gengh	T395476	main

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Related Objects
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		Status	Subtype	Assigned	Task
		Resolved		gonyeahialam	T397411 If we address usability findings from the Dagbani community, editors will encounter fewer or zero critical usability issues during testing and we will see an increase in use of embedded Wikifunctions in wikis.
		Resolved		gengh	T395475 Usability: Unclear input format and error handling for the "Age" function hinder successful use
		Resolved		gengh	T404092 Create try-catch and throw builtin functions to be able to test custom errors thrown by user code

Event Timeline

gengh created this task.Sep 9 2025, 2:47 PM

gengh claimed this task.

Please connect this to the OKR it blocks.

Jdforrester-WMF moved this task from Incoming to In Engineering on the Abstract Wikipedia team (26Q1 (Jul–Sep)) board.Sep 10 2025, 3:46 PM

Dv103 subscribed.Sep 11 2025, 1:01 PM

Z28154 is already a throw function.

gengh added a parent task: T397411: If we address usability findings from the Dagbani community, editors will encounter fewer or zero critical usability issues during testing and we will see an increase in use of embedded Wikifunctions in wikis..Sep 16 2025, 1:38 PM

Jdforrester-WMF edited parent tasks, added: T395475: Usability: Unclear input format and error handling for the "Age" function hinder successful use; removed: T397411: If we address usability findings from the Dagbani community, editors will encounter fewer or zero critical usability issues during testing and we will see an increase in use of embedded Wikifunctions in wikis..Sep 17 2025, 3:40 PM

gengh opened https://gitlab.wikimedia.org/repos/abstract-wiki/wikifunctions/function-schemata/-/merge_requests/272

definitions: add try-catch and throw function definition and implementation

gengh opened https://gitlab.wikimedia.org/repos/abstract-wiki/wikifunctions/function-schemata/-/merge_requests/273

definitions: add try-catch and throw function definition and implementation

jforrester merged https://gitlab.wikimedia.org/repos/abstract-wiki/wikifunctions/function-schemata/-/merge_requests/272

definitions: add try-catch and throw function definition and implementation

jforrester merged https://gitlab.wikimedia.org/repos/abstract-wiki/wikifunctions/function-schemata/-/merge_requests/273

definitions: add "is error type" and "get error" builtin functions, and identity keys to error types

Change #1190302 had a related patch set uploaded (by Jforrester; author: Jforrester):

[mediawiki/extensions/WikiLambda@master] Update function-schemata sub-module to HEAD (e23a73d)

https://gerrit.wikimedia.org/r/1190302

jforrester opened https://gitlab.wikimedia.org/repos/abstract-wiki/wikifunctions/wikilambda-cli/-/merge_requests/89

Update function-schemata sub-module to HEAD (e23a73d)

jforrester opened https://gitlab.wikimedia.org/repos/abstract-wiki/wikifunctions/function-evaluator/-/merge_requests/411

Update function-schemata sub-module to HEAD (e23a73d)

jforrester opened https://gitlab.wikimedia.org/repos/abstract-wiki/wikifunctions/function-orchestrator/-/merge_requests/453

Update function-schemata sub-module to HEAD (e23a73d)

In T404092#11173734, @Dv103 wrote:

Z28154 is already a throw function.

Thanks, but it is premature, post-dates this task, and I think it should be eventually deleted. We're expecting to provide UX-level integration with this pre-defined Function, so a user-land equivalent has little value and will mostly just be confusing to people.

gengh merged https://gitlab.wikimedia.org/repos/abstract-wiki/wikifunctions/function-evaluator/-/merge_requests/411

Update function-schemata sub-module to HEAD (e23a73d)

gengh merged https://gitlab.wikimedia.org/repos/abstract-wiki/wikifunctions/wikilambda-cli/-/merge_requests/89

Update function-schemata sub-module to HEAD (e23a73d)

gengh merged https://gitlab.wikimedia.org/repos/abstract-wiki/wikifunctions/function-orchestrator/-/merge_requests/453

Update function-schemata sub-module to HEAD (e23a73d)

Change #1190302 merged by jenkins-bot:

[mediawiki/extensions/WikiLambda@master] Update function-schemata sub-module to HEAD (e23a73d)

https://gerrit.wikimedia.org/r/1190302

Maintenance_bot removed a project: Patch-For-Review.Sep 22 2025, 6:31 PM

Change #1191170 had a related patch set uploaded (by Jforrester; author: Jforrester):

[operations/deployment-charts@master] wikifunctions: Upgrade evaluators from 2025-09-16-190551 to 2025-09-24-083919

https://gerrit.wikimedia.org/r/1191170

Change #1191171 had a related patch set uploaded (by Jforrester; author: Jforrester):

[operations/deployment-charts@master] wikifunctions: Upgrade orchestrator from 2025-09-16-134119 to 2025-09-24-180530

https://gerrit.wikimedia.org/r/1191171

Change #1191170 merged by jenkins-bot:

[operations/deployment-charts@master] wikifunctions: Upgrade evaluators from 2025-09-16-190551 to 2025-09-24-083919

https://gerrit.wikimedia.org/r/1191170

Change #1191171 merged by jenkins-bot:

[operations/deployment-charts@master] wikifunctions: Upgrade orchestrator from 2025-09-16-134119 to 2025-09-24-180530

https://gerrit.wikimedia.org/r/1191171

Jdforrester-WMF moved this task from In Engineering to Needs Sign-off on the Abstract Wikipedia team (26Q1 (Jul–Sep)) board.Sep 24 2025, 9:39 PM

These Functions are now live, e.g. https://www.wikifunctions.org/view/en/Z852

Maintenance_bot removed a project: Patch-For-Review.Sep 24 2025, 10:33 PM

Jdforrester-WMF closed this task as Resolved.Oct 2 2025, 4:25 PM

gengh mentioned this in rMSFEd8e9b857f827: Update function-schemata sub-module to HEAD (e23a73d).Oct 3 2025, 9:45 AM