René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"CommandCompletion CompleteInput : NullReferenceException","articleBody":"### Prerequisites\r\n\r\n- [X] Write a descriptive title.\r\n- [X] Make sure you are able to repro it on the [latest released version](https://github.com/PowerShell/PowerShell/releases)\r\n- [X] Search the existing issues.\r\n- [X] Refer to the [FAQ](https://github.com/PowerShell/PowerShell/blob/master/docs/FAQ.md).\r\n- [X] Refer to [Differences between Windows PowerShell 5.1 and PowerShell](https://docs.microsoft.com/powershell/scripting/whats-new/differences-from-windows-powershell).\r\n\r\n### Steps to reproduce\r\n\r\nI develop an UI app with d**otnet sdk 8.0.100-preview.5.23303.2**\r\nI am using the workaround for this SDK because there is a problem with MMI : \r\n```xml\r\n\u003cRuntimeHostConfigurationOption Include=\"System.Runtime.Loader.UseRidGraph\" Value=\"true\" /\u003e\r\n```\r\n\r\nBut when I migrate from **PowerShell 7.4.0-preview.3** to **7.4.0-preview.4**, I am experiencing a NullReference exception with the API System.Management.Automation.CommandCompletion.CompleteInput\r\n\r\n```CSharp\r\nvar completion = CommandCompletion.CompleteInput(text, caretOffset, new Hashtable());\r\n```\r\n\r\n### Expected behavior\r\n\r\n```console\r\nIt works.\r\n```\r\n\r\n\r\n### Actual behavior\r\n\r\n```console\r\nIt failed.\r\n```\r\n\r\n\r\n### Error details\r\n\r\n```console\r\nSystem.NullReferenceException: 'Object reference not set to an instance of an object.'\r\n   at System.Management.Automation.CommandCompletion.CompleteInputImpl(Ast ast, Token[] tokens, IScriptPosition positionOfCursor, Hashtable options)\r\n   at System.Management.Automation.CommandCompletion.CompleteInput(String input, Int32 cursorIndex, Hashtable options)\r\n```\r\n\r\n\r\n### Environment data\r\n\r\n```powershell\r\nName                           Value\r\n----                           -----\r\nPSVersion                      7.4.0-preview.4\r\nPSEdition                      Core\r\nGitCommitId                    7.4.0-preview.4\r\nOS                             Microsoft Windows 10.0.22621\r\nPlatform                       Win32NT\r\nPSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}\r\nPSRemotingProtocolVersion      2.3\r\nSerializationVersion           1.1.0.1\r\nWSManStackVersion              3.0\r\n```\r\n\r\n\r\n### Visuals\r\n\r\n_No response_","author":{"url":"https://github.com/fMichaleczek","@type":"Person","name":"fMichaleczek"},"datePublished":"2023-07-09T15:37:05.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/19912/PowerShell/issues/19912"}