[Bug?] ImportC: undefined RTInfoImpl for imported C struct's TypeInfo on 2.112

[Richard (Rikki) Andrew Cattermole]

On 03/07/2026 7:06 AM, Danny Arends wrote:
> # Is import-only |RTInfo| emission expected to work in 2.112, or is 
> compiling the ImportC unit now required by design (fallout from the AA/ 
> array-hook templatization)?

No.

If you don't compile a file, you don't get the symbols that it provides.

This is true for D, as it is C++.

> # Is this the same as fixed Issue 10442 <https://bugzilla- 
> archive.dlang.org/bugs/10442/> ("RTInfo generation can fail for structs 
> defined in imported modules"), incompletely fixed?

I don't think so. It never should have worked with dmd's current 
generation model for TypeInfo.