[gcc r15-7574] c++: Add testcase for now fixed issue [PR117324]

[Simon Martin via Gcc-cvs]

https://gcc.gnu.org/g:6302f478433166f71464bc06caf5701c1800a7e7

commit r15-7574-g6302f478433166f71464bc06caf5701c1800a7e7
Author: Simon Martin <si...@nasilyan.com>
Date:   Sun Feb 16 11:00:19 2025 +0100

    c++: Add testcase for now fixed issue [PR117324]
    
    The case in this PR does not ICE anymore after the fix for PR118319.
    
    This patch simply adds the case to the testsuite.
    
            PR c++/117324
    
    gcc/testsuite/ChangeLog:
    
            * g++.dg/parse/defarg19.C: New test.

Diff:
---
 gcc/testsuite/g++.dg/parse/defarg19.C | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/gcc/testsuite/g++.dg/parse/defarg19.C 
b/gcc/testsuite/g++.dg/parse/defarg19.C
new file mode 100644
index 000000000000..df0819ae6a5e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/parse/defarg19.C
@@ -0,0 +1,12 @@
+// PR c++/117324
+// { dg-do "compile" { target c++11 } }
+
+template<typename = int>
+struct ct1 {
+  friend void f(ct1, // { dg-error "specifies default" }
+               int = [](int p = [] {}) { return p; }(); ) // { dg-error 
"expected|declares a non-template" }
+  {}
+};
+void test() {
+  f(ct1{}); // { dg-error "missing template arguments|not declared" "" { 
target c++14_down } }
+}