Metrics analyzer for Razor: Lines of code are outside the range of the file

[martin-strecker-sonarsource]

Community report:
https://community.sonarsource.com/t/java-lang-illegalargumentexception-line-575-is-out-of-range-for-file-xxx-file-has-386-lines/108740/15

The razor source generator of .Net SDK 9.0.100-preview.3.24204.13 produces a file with missing #line default and #line hidden directives for using directives:

                #line (1,2)-(2,1) "File.razor"
                using System.Net.Http

                #nullable disable
                    ;
                #nullable restore

Instead, the generated code should look like so:

                #line (1,2)-(2,1) "File.razor"
                using System.Net.Http

                #line default
                #line hidden
                #nullable disable
                    ;
                #nullable restore

As a result, we count the ; as code line but the mapping is beyond the length of the file if the using is the only content of the file like in _Imports.razor

[martin-strecker-sonarsource]

How to fix:
We need to make sure, the range added here is within the document:

sonar-dotnet/analyzers/src/SonarAnalyzer.Common/Metrics/MetricsBase.cs

Line 53 in ef727d3

return Enumerable.Range(start, end - start + 1);