[Bug libstdc++/119545] tuple::operator==()'s help lambda does not specify return type as bool

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119545

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

--- a/libstdc++-v3/include/std/tuple
+++ b/libstdc++-v3/include/std/tuple
@@ -2534,7 +2534,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     {
       return [&]<size_t... _Inds>(index_sequence<_Inds...>) {
        // Fold == over the tuples until non-equal elements are found.
-       return ((std::get<_Inds>(__t) == std::get<_Inds>(__u)) && ...);
+       return (bool(std::get<_Inds>(__t) == std::get<_Inds>(__u)) && ...);
       }(index_sequence_for<_Tps...>{});
     }