https://issues.dlang.org/show_bug.cgi?id=21299
--- Comment #6 from Dlang Bot <[email protected]> --- dlang/dmd pull request #11867 "[dmd-cxx] Fix Issue 21299: Undefined reference to dmd.root.stringtable.StringValue!(Type).lstring()" was merged into dmd-cxx: - 9ab13379acf226069ced667455d834acf217cc66 by Iain Buclaw: [dmd-cxx] Fix Issue 21299: Undefined reference to dmd.root.stringtable.StringValue!(Type).lstring() In `templateInstanceSemantic`, there exists special handling of matching template instances for the same template declaration to ensure that only at most one instance gets codegen'd. If the primary instance `inst` originated from a non-root module, the `minst` field will be updated so it is now coming from a root module, however all Dsymbol `inst.members` of the instance still have their `_scope.minst` pointing at the original non-root module. We must now propagate `minst` to all members so that forward referenced dependencies that get instantiated will also be appended to the root module, otherwise there will be undefined references at link-time. This doesn't affect compilations where all modules are compiled together, as every module is a root module in that situation. What this primarily affects are cases where there is a mix of root and non-root modules, and a template was first instantiated in a non-root context, then later instantiated again in a root context. https://github.com/dlang/dmd/pull/11867 --
