diff options
| -rw-r--r-- | libstdc++-v3/include/bits/random.tcc | 2 | ||||
| -rw-r--r-- | libstdc++-v3/testsuite/26_numerics/random/binomial_distribution/114359.cc | 12 |
2 files changed, 13 insertions, 1 deletions
diff --git a/libstdc++-v3/include/bits/random.tcc b/libstdc++-v3/include/bits/random.tcc index 4164420..5d9f679 100644 --- 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; diff --git a/libstdc++-v3/testsuite/26_numerics/random/binomial_distribution/114359.cc b/libstdc++-v3/testsuite/26_numerics/random/binomial_distribution/114359.cc new file mode 100644 index 0000000..c1e4c38 --- /dev/null +++ b/libstdc++-v3/testsuite/26_numerics/random/binomial_distribution/114359.cc @@ -0,0 +1,12 @@ +// { dg-do run { target c++11 } } + +// Bug 114359 - std::binomial_distribution hangs in infinite loop + +#include <random> + +int main() +{ + std::default_random_engine g{}; + std::binomial_distribution<std::uint32_t> b(1U << 30); + b(g); // hangs forever +} |