The bug when change to vim normal mode
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Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 48/100
Research direction
Start by reproducing the reported key sequence in PSReadLine 2.4.5 on PowerShell 7.6.2, then trace the ViIndicateCommandMode and ViCommandMode entries shown in the exception stack. Done means pressing Escape to enter Vim normal mode no longer displays a null-valued-expression error.
Written by the indexing model from the issue text.
Description
Prerequisites
- Write a descriptive title.
- Make sure you are able to repro it on the latest released version
- Search the existing issues, especially the pinned issues.
Exception report
### Environment
PSReadLine: 2.4.5
PowerShell: 7.6.2
OS: Microsoft Windows 10.0.26200
BufferWidth: 145
BufferHeight: 35
Last 11 Keys:
l s Backspace Backspace Escape i c l s Enter Escape
### Exception
System.Management.Automation.RuntimeException: You cannot call a method on a null-valued expression.
at System.Management.Automation.ExceptionHandlingOps.CheckActionPreference(FunctionContext funcContext, Exception exception)
at System.Management.Automation.Interpreter.ActionCallInstruction`2.Run(InterpretedFrame frame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
at System.Management.Automation.Interpreter.Interpreter.Run(InterpretedFrame frame)
at System.Management.Automation.Interpreter.LightLambda.RunVoid1[T0](T0 arg0)
at System.Management.Automation.ScriptBlock.InvokeWithPipeImpl(ScriptBlockClauseToInvoke clauseToInvoke, Boolean createLocalScope, Dictionary`2 functionsToDefine, List`1 variablesToDefine, ErrorHandlingBehavior errorHandlingBehavior, Object dollarUnder, Object input, Object scriptThis, Pipe outputPipe, InvocationInfo invocationInfo, Object[] args)
at System.Management.Automation.ScriptBlock.InvokeWithPipe(Boolean useLocalScope, ErrorHandlingBehavior errorHandlingBehavior, Object dollarUnder, Object input, Object scriptThis, Pipe outputPipe, InvocationInfo invocationInfo, Boolean propagateAllExceptionsToTop, List`1 variablesToDefine, Dictionary`2 functionsToDefine, Object[] args)
at System.Management.Automation.ScriptBlock.DoInvokeReturnAsIs(Boolean useLocalScope, ErrorHandlingBehavior errorHandlingBehavior, Object dollarUnder, Object input, Object scriptThis, Object[] args)
at System.Management.Automation.ScriptBlock.InvokeReturnAsIs(Object[] args)
at Microsoft.PowerShell.PSConsoleReadLine.ViIndicateCommandMode()
at Microsoft.PowerShell.PSConsoleReadLine.ViCommandMode(Nullable`1 key, Object arg)
at Microsoft.PowerShell.PSConsoleReadLine.ProcessOneKey(PSKeyInfo key, Dictionary`2 dispatchTable, Boolean ignoreIfNoAction, Object arg)
at Microsoft.PowerShell.PSConsoleReadLine.InputLoop()
at Microsoft.PowerShell.PSConsoleReadLine.ReadLine(Runspace runspace, EngineIntrinsics engineIntrinsics, CancellationToken cancellationToken, Nullable`1 lastRunStatus)
Screenshot
when press escape to change to vim normal model, show the bug information above.
Environment data
### Environment
PSReadLine: 2.4.5
PowerShell: 7.6.2
OS: Microsoft Windows 10.0.26200
BufferWidth: 145
BufferHeight: 35
Last 11 Keys:
l s Backspace Backspace Escape i c l s Enter Escape
Steps to reproduce
press escape to change to vim normal model, it and enter into normal model , but show the bug information everytime
Expected behavior
don't show the bug information
Actual behavior
show bug information
- Dominant language
- C#
- Stars
- 4.4k
- Forks
- 341
- PR merge metrics
- No merged PRs in 30d
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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