Extension error on extension activation

[sm11963]

Repro

1. Install the extension
2. Open the "Extension Host" output tab

Outcome

Error on activation.

Expected outcome

No errors on activation.

Logs / output / settings

Logs from "Extension Host":

2024-09-18 23:07:06.131 [info] ExtensionService#_doActivateExtension pucelle.run-on-save, startup: false, activationEvent: 'onStartupFinished'
2024-09-18 23:07:11.859 [error] Error: Illegal argument: commandLine
	at P (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:10:1144)
	at new ai (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:159:29406)
	at Object.provideTasks (/Users/smiller/.vscode/extensions/emallin.phpunit-4.16.1/out/extension.js:60:113)
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:164:61765
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:107:14919
	at new Promise (<anonymous>)
	at m (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:107:14888)
	at i.$provideTasks (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:164:61749)
	at y.S (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:158:5968)
	at y.Q (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:158:5734)
	at y.M (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:158:4767)
	at y.L (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:158:3602)
	at i.value (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:158:2297)
	at r.B (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:90:732)
	at r.fire (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:90:949)
	at a.fire (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:115:14463)
	at i.value (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:184:8635)
	at r.B (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:90:732)
	at r.fire (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:90:949)
	at a.fire (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:115:14463)
	at MessagePortMain.<anonymous> (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:184:6761)
	at MessagePortMain.emit (node:events:519:28)
	at MessagePortMain._internalPort.emit (node:electron/js2c/utility_init:2:2619)

Environment	Values
Extension version	4.16.1
Operating system	14.6.1