[Bug libstdc++/114359] std::binomial_distribution hangs in infinite loop

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114359

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This seems to fix it:

--- a/libstdc++-v3/include/bits/random.tcc
+++ b/libstdc++-v3/include/bits/random.tcc
@@ -1503,7 +1503,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
          // sqrt(pi / 2)
          const double __spi_2 = 1.2533141373155002512078826424055226L;
          _M_s1 = std::sqrt(__np * __1p) * (1 + _M_d1 / (4 * __np));
-         _M_s2 = std::sqrt(__np * __1p) * (1 + _M_d2 / (4 * _M_t * __1p));
+         _M_s2 = std::sqrt(__np * __1p) * (1 + _M_d2 / (4 * (_M_t * __1p)));
          _M_c = 2 * _M_d1 / __np;
          _M_a1 = std::exp(_M_c) * _M_s1 * __spi_2;
          const double __a12 = _M_a1 + _M_s2 * __spi_2;