Boost release 1.72.0 beta 1 is now available at: <https://dl.bintray.com/boostorg/beta/1.72.0.beta.1/source/> The SHA256 checksums are as follows: 5a6b5cbd27b8ca0c7741b715e022a3bf05aecbb1e73dc72dd82eef9622374bd5 boost_1_72_0_b1.7z 6c85a7aed198757f5e4be66a971ae90a25c4ce32703fecfb5bb19019bd80947c boost_1_72_0_b1.tar.bz2 be4a3fdaa84d5a8b25863651043308e02645f3fbf772b7623ee6462fb1dbad09 boost_1_72_0_b1.tar.gz 95181a5f3de0078b8fc031f63a4dc8be4d70b7d3d5cde3b266d2cd98bd4b61b0 boost_1_72_0_b1.zip For details of what's in the release, see <https://www.boost.org/users/history/version_1_72_0.html>. Please download the beta, give it a try, and report any problems you encounter. Thanks, -- The Boost Release Team