Undeduced auto type in TypeSourceInfo?

We have a doubt regarding occurrences of AutoType in the AST.
Consider the following example:

   auto i = 0;

From this VarDecl node we can reach two different QualType nodes:
- using getType() we reach a deduced (int) AutoType;
- using getTypeSourceInfo()->getType() we reach an undeduced AutoType.

Is this really meant, or should the deduction process have updated the TypeSourceInfo field too? If meant, are there other ways to obtain the deduced type while visiting the type source info component (e.g., using the RecursiveASTVisitor) ?