[gcc r13-6568] c++: overloaded fn in contract [PR108542]

[Jason Merrill <jason@gcc.gnu.org>]

https://gcc.gnu.org/g:68c5d92a1390ecccb61d3600a95eeff6caf7ccdf

commit r13-6568-g68c5d92a1390ecccb61d3600a95eeff6caf7ccdf
Author: Jason Merrill <jason@redhat.com>
Date:   Thu Mar 9 17:22:46 2023 -0500

    c++: overloaded fn in contract [PR108542]
    
            PR c++/108542
    
    gcc/cp/ChangeLog:
    
            * class.cc (instantiate_type): Strip location wrapper.
    
    gcc/testsuite/ChangeLog:
    
            * g++.dg/contracts/contracts-err1.C: New test.

Diff:
---
 gcc/cp/class.cc                                 | 2 ++
 gcc/testsuite/g++.dg/contracts/contracts-err1.C | 7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/gcc/cp/class.cc b/gcc/cp/class.cc
index 27a79829737..d37e9d4d576 100644
--- a/gcc/cp/class.cc
+++ b/gcc/cp/class.cc
@@ -8728,6 +8728,8 @@ instantiate_type (tree lhstype, tree rhs, tsubst_flags_t complain)
 
   complain &= ~tf_ptrmem_ok;
 
+  STRIP_ANY_LOCATION_WRAPPER (rhs);
+
   if (lhstype == unknown_type_node)
     {
       if (complain & tf_error)
diff --git a/gcc/testsuite/g++.dg/contracts/contracts-err1.C b/gcc/testsuite/g++.dg/contracts/contracts-err1.C
new file mode 100644
index 00000000000..8437d94e2ad
--- /dev/null
+++ b/gcc/testsuite/g++.dg/contracts/contracts-err1.C
@@ -0,0 +1,7 @@
+// PR c++/108542
+// { dg-additional-options -fcontracts }
+// { dg-do compile { target c++11 } }
+
+template<typename T>
+void f (T n) {}
+void g() [[pre: f]];			// { dg-error "overloaded" }