https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90189
Bug ID: 90189
Summary: Spurious "error: parameter packs not expanded" when a
dependent name coincides
Product: gcc
Version: 9.0
URL: https://godbolt.org/z/UuwYK4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: lkoppel at uwaterloo dot ca
Target Milestone: ---
Source:
struct A {
using CommonName = char;
};
template <typename T, typename... CommonName>
struct B {
using V = typename T::CommonName;
};
template struct B<A>;
Output:
<source>:7:37: error: parameter packs not expanded with '...':
7 | using V = typename T::CommonName;
| ^
<source>:7:37: note: 'CommonName'
Compiler returned: 1
Rejected by all GCC versions. Accepted by clang, msvc.
