[Bug c++/92598] explicit specialization of template from unnamed namespace using unqualified-id in enclosing namespace

[jan.kratochvil at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92598

--- Comment #3 from Jan Kratochvil <jan.kratochvil at redhat dot com> ---
LLVM has workarounded it by:
https://reviews.llvm.org/rG0e3d7e61867d69721b28e557272bdf4b66010327
template <>
- struct DenseMapInfo<std::pair<const MCSymbol *,
MCSymbolRefExpr::VariantKind>> {
+ struct llvm::DenseMapInfo<std::pair<const MCSymbol *,
MCSymbolRefExpr::VariantKind>> {