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;
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<tr><td><span title='2020-04-21 16:33:21 +0200'>2020-04-21</span></td><td><a href='/guix/commit/gnu/tests/ssh.scm?id=a295a1ca2942794ac52321a639128f94be595ac5'>tests: ssh: Explicitly wait for port 22.</a><span class='msg-avail'>...<span class='msg-tooltip'>Previously we could occasionally try to connect before the server is
actually listening, both for OpenSSH and Dropbear.

* gnu/tests/ssh.scm (run-ssh-test)["wait for port 22"]: New test.
</span></span></td><td>Ludovic Courtès</td></tr>