Here friend matching tries to find a matching non-template friend and fails,
so we mark the friend as a template specialization to be determined later.
Then cplus_decl_attributes tries again to find a matching function and gets
confused by DECL_TEMPLATE_INSTANTIATION without DECL_TEMPLATE_INFO. But it
doesn't make sense for find_last_decl to be trying to match anything with
DECL_USE_TEMPLATE set; those are matched elsewhere.
PR c++/107484
gcc/cp/ChangeLog:
* decl2.cc (find_last_decl): Return early if DECL_USE_TEMPLATE.
gcc/testsuite/ChangeLog:
* g++.dg/lookup/friend25.C: New test.
if (tree name = DECL_P (decl) ? DECL_NAME (decl) : NULL_TREE)
{
+ /* Template specializations are matched elsewhere. */
+ if (DECL_LANG_SPECIFIC (decl)
+ && DECL_USE_TEMPLATE (decl))
+ return NULL_TREE;
+
/* Look up the declaration in its scope. */
tree pushed_scope = NULL_TREE;
if (tree ctype = DECL_CONTEXT (decl))
--- /dev/null
+// PR c++/107484
+
+namespace qualified_friend_no_match {
+ void f(int);
+ template<typename T> void f(T*);
+ struct X {
+ friend void qualified_friend_no_match::f(double); // { dg-error "does not match any template" }
+ };
+}