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='2023-09-09 19:03:38 -0400'>2023-09-09</span></td><td><a href='/guix/commit/gnu/packages/datastructures.scm?id=ff3eb851171f20654b8d6462c6b01ff3198a60e5'>gnu: liburcu: Update to 0.14.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/datastructures.scm (liburcu): Update to 0.14.0.

Signed-off-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
</span></span></td><td>Olivier Dion</td></tr>
<tr><td><span title='2023-05-19 13:12:29 +0200'>2023-05-19</span></td><td><a href='/guix/commit/gnu/packages/datastructures.scm?id=73d3cb95650691b4209834745c80da0cdcb8f59e'>gnu: zix: Update to 0.3.3-0.a13ae5a.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/datastructures.scm (zix): Update to 0.3.3-0.a13ae5a.
</span></span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2023-05-08 22:28:13 +0200'>2023-05-08</span></td><td><a href='/guix/commit/gnu/packages/datastructures.scm?id=2b99492f5d7800736484f22b723c8e7ce2df134a'>gnu: tllist: Update to 1.1.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/datastructures.scm (tllist): Update to 1.1.0.

Signed-off-by: Jelle Licht &lt;jlicht@fsfe.org&gt;
</span></span></td><td>Benjamin</td></tr>
<tr><td><span title='2023-04-07 15:52:54 -0400'>2023-04-07</span></td><td><a href='/guix/commit/gnu/packages/datastructures.scm?id=d2e932cd45bb3bd156b905a0e065ea3509121d68'>gnu: Add zix.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/datastructures.scm (zix): New variable.

Signed-off-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
Modified-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
</span></span></td><td>Antero Mejr</td></tr>
<tr><td><span title='2023-02-17 23:58:59 +0100'>2023-02-17</span></td><td><a href='/guix/commit/gnu/packages/datastructures.scm?id=46c06fedbc155e52f9f5173846d531130ab8c8fc'>gnu: Add coucal.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/datastructures.scm (coucal): New variable.
</span></span></td><td>Nicolas Goaziou</td></tr>