System.NullReferenceException when using Invoke-ScriptAnalyzer #1181
Description
Before submitting a bug report:
- Make sure you are able to repro it on the latest released version
- Perform a quick search for existing issues to check if this bug has already been reported
Steps to reproduce
Execute Invoke-ScriptAnalyzer on file which has:
enum LogLevel
{
Error
Information
Verbose
Debug
}
class Logger
{
static [Logger] $instance
}
function Write-Log
{
[CmdletBinding()]
param(
[Parameter(Mandatory = $true, Position = 0)] [LogLevel] $LogLevel,
[Parameter(Mandatory = $true, Position = 1)] [string] $Message,
[Parameter()][switch] $NewLog
)
Enable-Logger
$script:logger.WriteLog($LogLevel, $Message, $NewLog.IsPresent)
}Expected behavior
no NullReferenceException
Actual behavior
Exception : System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Windows.PowerShell.ScriptAnalyzer.Helper.<>c__DisplayClass61_0.<GetTypeFromMemberExpressionAst>b__0(TypeDefinitionAst item)
at System.Linq.Enumerable.TryGetFirst[TSource](IEnumerable`1 source, Func`2 predicate, Boolean& found)
at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
at Microsoft.Windows.PowerShell.ScriptAnalyzer.Helper.GetTypeFromMemberExpressionAst(MemberExpressionAst memberAst, Ast scopeAst, IEnumerable`1 classes)
at Microsoft.Windows.PowerShell.ScriptAnalyzer.FindPipelineOutput.VisitInvokeMemberExpression(InvokeMemberExpressionAst invokeAst)
at System.Management.Automation.Language.InvokeMemberExpressionAst.Accept(ICustomAstVisitor visitor)
at System.Management.Automation.Language.Ast.Visit(ICustomAstVisitor astVisitor)
at Microsoft.Windows.PowerShell.ScriptAnalyzer.FindPipelineOutput.VisitCommandExpression(CommandExpressionAst commandAst)
at System.Management.Automation.Language.CommandExpressionAst.Accept(ICustomAstVisitor visitor)
at System.Management.Automation.Language.Ast.Visit(ICustomAstVisitor astVisitor)
at Microsoft.Windows.PowerShell.ScriptAnalyzer.FindPipelineOutput.VisitPipeline(PipelineAst pipelineAst)
at System.Management.Automation.Language.PipelineAst.Accept(ICustomAstVisitor visitor)
at System.Management.Automation.Language.Ast.Visit(ICustomAstVisitor astVisitor)
at Microsoft.Windows.PowerShell.ScriptAnalyzer.FindPipelineOutput.VisitNamedBlock(NamedBlockAst namedBlockAst)
at System.Management.Automation.Language.NamedBlockAst.Accept(ICustomAstVisitor visitor)
at System.Management.Automation.Language.Ast.Visit(ICustomAstVisitor astVisitor)
at Microsoft.Windows.PowerShell.ScriptAnalyzer.FindPipelineOutput.VisitScriptBlock(ScriptBlockAst scriptBlockAst)
at System.Management.Automation.Language.ScriptBlockAst.Accept(ICustomAstVisitor visitor)
at System.Management.Automation.Language.Ast.Visit(ICustomAstVisitor astVisitor)
at Microsoft.Windows.PowerShell.ScriptAnalyzer.FindPipelineOutput..ctor(FunctionDefinitionAst ast, IEnumerable`1 classes)
at Microsoft.Windows.PowerShell.ScriptAnalyzer.FindPipelineOutput.OutputTypes(FunctionDefinitionAst funcAst, IEnumerable`1 classes)
at Microsoft.Windows.PowerShell.ScriptAnalyzer.BuiltinRules.UseOutputTypeCorrectly.VisitFunctionDefinition(FunctionDefinitionAst funcAst)
at System.Management.Automation.Language.FunctionDefinitionAst.InternalVisit(AstVisitor visitor)
at System.Management.Automation.Language.StatementBlockAst.InternalVisit(AstVisitor visitor, ReadOnlyCollection`1 traps, ReadOnlyCollection`1 statements, AstVisitAction action)
at System.Management.Automation.Language.NamedBlockAst.InternalVisit(AstVisitor visitor)
at System.Management.Automation.Language.ScriptBlockAst.InternalVisit(AstVisitor visitor)
at System.Management.Automation.Language.Ast.Visit(AstVisitor astVisitor)
at Microsoft.Windows.PowerShell.ScriptAnalyzer.BuiltinRules.UseOutputTypeCorrectly.AnalyzeScript(Ast ast, String fileName)
at Microsoft.Windows.PowerShell.ScriptAnalyzer.ScriptAnalyzer.<>c__DisplayClass82_1.<AnalyzeSyntaxTree>b__2()
If an unexpected error was thrown then please report the full error details using e.g. $error[0] | Select-Object *
Environment data
> $PSVersionTable
Name Value
---- -----
PSVersion 6.1.3
PSEdition Core
GitCommitId 6.1.3
OS Microsoft Windows 10.0.18860
Platform Win32NT
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0
> (Get-Module -ListAvailable PSScriptAnalyzer).Version | ForEach-Object { $_.ToString() }
1.18.0
1.16.1