We correctly accept this testcase since r11-1571.
Tested x86_64-pc-linux-gnu, applying to trunk.
gcc/testsuite/ChangeLog:
PR c++/94102
* g++.dg/cpp1z/class-deduction87.C: New test.
---
gcc/testsuite/g++.dg/cpp1z/class-deduction87.C | 15 +++++++++++++++
1 file changed, 15 insertions(+)
create mode 100644 gcc/testsuite/g++.dg/cpp1z/class-deduction87.C
diff --git a/gcc/testsuite/g++.dg/cpp1z/class-deduction87.C
b/gcc/testsuite/g++.dg/cpp1z/class-deduction87.C
new file mode 100644
index 00000000000..37296a435c4
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp1z/class-deduction87.C
@@ -0,0 +1,15 @@
+// PR c++/94102
+// { dg-do compile { target c++17 } }
+
+namespace std {
+ template <typename _Tp> using decay_t = _Tp;
+}
+template <typename... B> struct Merged : B... {
+ template <typename... T> Merged(T... t) : B(t)... {}
+};
+template <typename... T> Merged(T...) -> Merged<std::decay_t<T>...>;
+int main() {
+ auto l1 = [] {};
+ auto l2 = [](int i) { return i; };
+ Merged(l1, l2);
+}
base-commit: fb9f5e1028df0fe6f2ff9d220efd75970e46bff0
--
2.31.1
