Bug Report T675468
Visible to All Users

Static Code Analysis - The "Possible System.NullReferenceException" diagnostic should take OrElse-Condition with For-Each-Statement into account

created 6 years ago

This false positive is only reported, when using an OrElse-Condition in a Null-Check an using the checked variable in a For-Each-Statement. Please see following example:

Visual Basic
Public Class Class1 Public Function Foo() As Integer Dim list As String() = Nothing If (list Is Nothing) OrElse (list.Count = 0) Then list = {"Item"} End If 'CRR0027 (false positive) For Each listItem As String In list 'Do something Next 'No CRR0027 Return list.Count End Function Public Function Bar() As Integer Dim list As String() = Nothing If (list Is Nothing) Then list = {"Item"} ElseIf (list.Count = 0) Then list = {"Item"} End If 'No CRR0027 For Each listItem As String In list 'Do something Next 'No CRR0027 Return list.Count End Function End Class
Comments (1)
DevExpress Support Team 6 years ago

    Hi Robert,

    Thank you for providing the code sample. I have reproduced this issue with the "Possible System.NullReferenceException" diagnostic false positive. We are working on it and will notify you on our progress.

    Answers approved by DevExpress Support

    created 6 years ago

    We have fixed the issue described in this ticket and will include the fix in our next maintenance update. To apply this solution before the official update, request a hotfix by clicking the corresponding link for product versions you require.

    Note: Hotfixes may be unavailable for beta versions and updates that are about to be released.

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