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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/105502] [9/10/11/12/13 Regression]
 std::normal_distribution deserialization issue
Date: Fri, 06 May 2022 20:51:19 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105502

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Or:

--- a/libstdc++-v3/include/bits/random.tcc
+++ b/libstdc++-v3/include/bits/random.tcc
@@ -1961,7 +1961,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       bool __saved_avail;
       if (__is >> __mean >> __stddev >> __saved_avail)
        {
-         if (__saved_avail && (__is >> __x._M_saved))
+         if (!__saved_avail || (__is >> __x._M_saved))
            {
              __x._M_saved_available =3D __saved_avail;
              __x.param(param_type(__mean, __stddev));=