René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Particular code completion crashes PowerShell","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\nThe following snippet crashes PowerShell 7.3.3 and VSCode configured for 7.3.3.\r\nIt also crashes PowerShell 7.4.0-daily20230309.2\r\n\r\n(1) paste the following snippet to the command line (editor in VSCode)\r\n\r\n```powershell\r\nforeach($item in Get-Item *.md) {switch -File $_.F -Regex { default { throw 42 }}}\r\n```\r\n\r\n(2) Move the caret to the end of `$_.F`\r\n\r\n(3) Press `Tab` (`Ctrl+Space` in VSCode)\r\n\r\nAs a result, PowerShell crashes.\r\n\r\n\r\n### Expected behavior\r\n\r\nPowerShell does not crash.\r\n\r\n\r\n### Actual behavior\r\n\r\nPowerShell crashes.\r\n\r\n\r\n### Error details\r\n\r\n```console\r\nRepeat 15622 times:\r\n--------------------------------\r\n   at System.Management.Automation.TypeInferenceVisitor.InferTypesFrom(System.Management.Automation.Language.MemberExpressionAst)\r\n   at System.Management.Automation.TypeInferenceVisitor.AddInferredTypesForDollarUnderbar(System.Management.Automation.Language.Ast, System.Collections.Generic.List`1\u003cSystem.Management.Automation.PSTypeName\u003e)\r\n   at System.Management.Automation.TypeInferenceVisitor.InferTypeFrom(System.Management.Automation.Language.VariableExpressionAst, System.Collections.Generic.List`1\u003cSystem.Management.Automation.PSTypeName\u003e)\r\n   at System.Management.Automation.TypeInferenceVisitor.System.Management.Automation.Language.ICustomAstVisitor.VisitVariableExpression(System.Management.Automation.Language.VariableExpressionAst)\r\n   at System.Management.Automation.TypeInferenceVisitor.GetExpressionType(System.Management.Automation.Language.ExpressionAst, Boolean)\r\n--------------------------------\r\n   at System.Management.Automation.TypeInferenceVisitor.InferTypesFrom(System.Management.Automation.Language.MemberExpressionAst)\r\n   at System.Management.Automation.TypeInferenceVisitor.AddInferredTypesForDollarUnderbar(System.Management.Automation.Language.Ast, System.Collections.Generic.List`1\u003cSystem.Management.Automation.PSTypeName\u003e)\r\n...\r\n```\r\n\r\n\r\n### Environment data\r\n\r\n```powershell\r\nName                           Value\r\n----                           -----\r\nPSVersion                      7.3.3\r\nPSEdition                      Core\r\nGitCommitId                    7.3.3\r\nOS                             Microsoft Windows 10.0.19045\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","author":{"url":"https://github.com/nightroman","@type":"Person","name":"nightroman"},"datePublished":"2023-03-23T17:30:14.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":7},"url":"https://github.com/19399/PowerShell/issues/19399"}