PowerShell crashes when importing `CompletionPredictor` from another module with certain names

[conioh]

Prerequisites

• Write a descriptive title.
• Make sure you are able to repro it on the latest version
• Search the existing issues.

Steps to reproduce

1. Clone the repo https://github.com/conioh/CompletionPredictorBug to D:\
2. Launch C:\Windows\System32\conhost.exe C:\Windows\System32\cmd.exe /k "C:\Program Files\PowerShell\7\pwsh.exe" -NoProfile
3. Run the following command in the new PowerShell instance: Import-Module -Name "D:\CompletionPredictorBug\CompletionPredictorBug\Buggity_bug.psd1"

Expected behavior

PowerShell 7.3.4
PS C:\Windows\System32> Get-Module

ModuleType Version PreRelease Name ExportedCommands
---------- ------- ---------- ---- ----------------
Script 2.2.6 PSReadLine {Get-PSReadLineKeyHandler, Get-PSReadLineOption, …

PS C:\Windows\System32> Import-Module -Name "D:\CompletionPredictorBug\CompletionPredictorBug\CompletionPredictorBug.psd1"
PS C:\Windows\System32> Get-Module

ModuleType Version PreRelease Name ExportedCommands
---------- ------- ---------- ---- ----------------
Manifest 0.1.1 CompletionPredictor
Script 0.1.0 CompletionPredictorBug
Script 2.2.6 PSReadLine {Get-PSReadLineKeyHandler, Get-PSReadLineOption, …

PS C:\Windows\System32>

Actual behavior

at System.Management.Automation.PowerShell+Worker.CreateRunspaceIfNeededAndDoWork(System.Management.Automation.Runspaces.Runspace, Boolean)
 at System.Management.Automation.PowerShell.CoreInvokeHelper[[System.__Canon, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]](System.Management.Automation.PSDataCollection`1<System.__Canon>, System.Management.Automation.PSDataCollection`1<System.__Canon>, System.Management.Automation.PSInvocationSettings)
 at System.Management.Automation.PowerShell.CoreInvoke[[System.__Canon, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]](System.Management.Automation.PSDataCollection`1<System.__Canon>, System.Management.Automation.PSDataCollection`1<System.__Canon>, System.Management.Automation.PSInvocationSettings)
 at System.Management.Automation.PowerShell.Invoke(System.Collections.IEnumerable, System.Management.Automation.PSInvocationSettings)
 at Microsoft.PowerShell.Predictor.PowerShellExtensions.InvokeAndCleanup(System.Management.Automation.PowerShell)
 at Microsoft.PowerShell.Predictor.CompletionPredictor.SyncModules(System.Management.Automation.PowerShell)
 at Microsoft.PowerShell.Predictor.CompletionPredictor.SyncRunspaceState(System.Object, System.Management.Automation.Runspaces.RunspaceAvailabilityEventArgs)
 at System.Management.Automation.Runspaces.RunspaceBase.OnAvailabilityChanged(System.Management.Automation.Runspaces.RunspaceAvailabilityEventArgs)
 at System.Management.Automation.Runspaces.PipelineBase.RaisePipelineStateEvents()
 at System.Management.Automation.Runspaces.PipelineBase.Invoke(System.Collections.IEnumerable)
 at Microsoft.PowerShell.Executor.ExecuteCommandHelper(System.Management.Automation.Runspaces.Pipeline, System.Exception ByRef, ExecutionOptions)
 at Microsoft.PowerShell.ConsoleHost+InputLoop.Run(Boolean)
 at Microsoft.PowerShell.ConsoleHost+InputLoop.RunNewInputLoop(Microsoft.PowerShell.ConsoleHost, Boolean)
 at Microsoft.PowerShell.ConsoleHost.EnterNestedPrompt()
 at Microsoft.PowerShell.ConsoleHost.DoRunspaceLoop(System.String, Boolean, System.Collections.ObjectModel.Collection`1<System.Management.Automation.Runspaces.CommandParameter>, Boolean, System.String, System.String)
 at Microsoft.PowerShell.ConsoleHost.Run(Microsoft.PowerShell.CommandLineParameterParser, Boolean)
 at Microsoft.PowerShell.ConsoleHost.Start(System.String, System.String, Boolean)
 at Microsoft.PowerShell.UnmanagedPSEntry.Start(System.String[], Int32)
 at Microsoft.PowerShell.ManagedPSEntry.Main(System.String[])

Error details

No response

Environment data

Name Value
---- -----
PSVersion 7.3.4
PSEdition Core
GitCommitId 7.3.4
OS Microsoft Windows 10.0.22621
Platform Win32NT
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0

Version

0.1.1

Visuals

[conioh]

Dongbo Wang (@daxian-dbw), thanks for the consideration. Great job!