[gcc r15-4983] testsuite: add infinite recursion test case [PR63388]

[David Malcolm via Gcc-cvs]

https://gcc.gnu.org/g:85736ba8e1fc4a5003f958dd268a155e379e059f

commit r15-4983-g85736ba8e1fc4a5003f958dd268a155e379e059f
Author: David Malcolm <dmalc...@redhat.com>
Date:   Wed Nov 6 08:45:29 2024 -0500

    testsuite: add infinite recursion test case [PR63388]
    
    gcc/testsuite/ChangeLog:
            PR c++/63388
            * g++.dg/analyzer/infinite-recursion-pr63388.C: New test.
    
    Signed-off-by: David Malcolm <dmalc...@redhat.com>

Diff:
---
 .../g++.dg/analyzer/infinite-recursion-pr63388.C    | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/gcc/testsuite/g++.dg/analyzer/infinite-recursion-pr63388.C 
b/gcc/testsuite/g++.dg/analyzer/infinite-recursion-pr63388.C
new file mode 100644
index 000000000000..74af8cad3fff
--- /dev/null
+++ b/gcc/testsuite/g++.dg/analyzer/infinite-recursion-pr63388.C
@@ -0,0 +1,21 @@
+// { dg-do compile { target c++11 } }
+
+namespace std
+{
+  class ostream;
+  extern ostream cout;
+}
+
+enum class Month {jan=1, feb, mar, apr, may, jun, jul, aug, sep, oct, nov, 
dec};
+
+std::ostream& operator<<(std::ostream& os, Month m)
+{
+  return os << m; // { dg-warning "infinite recursion" }
+}
+
+int main()
+{
+  Month m = Month::may;
+  std::cout << m;
+  return 0;
+}