SA1135UsingDirectivesMustBeQualified threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null. (Parameter 'syntax')

[Senderek]

.NET version: 9.0.1
Stylecop version: 1.2.0-beta.556

Error:
##[error]CSC(0,0): Error AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null. (Parameter 'syntax')'.

Line that triggers it:
using RequestResponse = (int UpdateCount, int CreateCount);

so using directive that is an alias for a new tuple.

[bjornhellander]

Looks like a duplicate of #3882

[smaillet]

I'm confused on how people are identifying the source location of these messages...

In my case I get:

3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.
3>CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.ReadabilityRules.SA1135UsingDirectivesMustBeQualified' threw an exception of type 'System.ArgumentNullException' with message 'Value cannot be null.

There's no indication of any source location in any of that

[bjornhellander]

@smaillet Long time since I saw one of these, but I think it's just a case of checking your changes since it didn't report AD0001 and maybe some trial and error after that. Normally it's easy since you would normally get an error banner in VS immediately when the live analysis runs and the analyzer throws an exception.