False positive null pointer C#

Rules and Languages Report False-positive / False-negative...
1

Make sure to read this post before raising a thread here:

C#
SonarScanner for MSBuild 5.11

if ((response?.Data?.Results?.Count ?? 0) == 0) return;

offset += response.Data.Results.Count;

Flagged as “‘response’ is null on at least one execution path.”.

If ‘response’ variable was equal to null it would return at first statement, therefor execution cannot reach 2nd line.

2

Hey there.

What version of SonarQube are you using (or are you using SonarCloud)?

3

Hi Colin,

We are using a SonarQube server, version 8.9.9.

SonarScanner for MSBuild 5.11, SonarScanner 4.8.0.2856

5

Hello jmcgee,

Thank you for reporting this false positive.
We are planning to improve the support for null coalescing operators for the rule in the future and I can confirm that this is a known false positive.

Best Martin

7

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