Fix for https://github.com/swig/swig/issues/2145 made in unreleased upstream commit
https://github.com/swig/swig/commit/76d5a9ec270a763c892ae28070e391cf99e0b7cd

diff --git a/Examples/test-suite/nested_class.i b/Examples/test-suite/nested_class.i
index b10c339493e..c778a12cf7c 100644
--- a/Examples/test-suite/nested_class.i
+++ b/Examples/test-suite/nested_class.i
@@ -201,7 +201,7 @@ struct Outer {
     Integer xx;
   } MultipleInstanceAnonDerived1, MultipleInstanceAnonDerived2, *MultipleInstanceAnonDerived3, MultipleInstanceAnonDerived4[2];
 
-#if defined(__GNUC__) || defined(_MSC_VER) || defined(SWIG)
+#if (defined(__GNUC__) && __GNUC__ < 12) || defined(_MSC_VER) || defined(SWIG)
 /* some compilers do not accept these */
   struct : public InnerMultiple {
     Integer xx;
