The second release candidates for the 1.83.0 release are now available at: https://boostorg.jfrog.io/artifactory/main/release/1.83.0/source/ The SHA256 checksums are as follows: c86bd9d9eef795b4b0d3802279419fde5221922805b073b9bd822edecb1ca28e boost_1_83_0_rc2.zip 6478edfe2f3305127cffe8caf73ea0176c53769f4bf1585be237eb30798c3b8e boost_1_83_0_rc2.tar.bz2 c0685b68dd44cc46574cce86c4e17c0f611b15e195be9848dfd0769a0a207628 boost_1_83_0_rc2.tar.gz 22ee9dcf3f1fb58f585772f70c69113a4077b92adeac58b643b3543b78633a16 boost_1_83_0_rc2.7z The only change between RC1 and RC2 is the addition of some missing "#include"s in Boost.Unordered As always, the release managers would appreciate it if you download the candidate of your choice and give building it a try. Please report both success and failure, and anything else that is noteworthy. -- The Release managers