On Thu, Apr 23, 2020 at 8:53 AM Marshall Clow via Boost <boost@lists.boost.org> wrote:
The first release candidates for the 1.73.0 release are now available at:

<https://dl.bintray.com/boostorg/release/1.73.0/source/>

The SHA256 checksums are as follows:

d2e7501bb04fe7abc09aa93f013ae997604286a882da1bd36ddd96ea1163ea71
 boost_1_73_0_rc1.7z
4eb3b8d442b426dc35346235c8733b5ae35ba431690e38c6a8263dce9fcbb402
 boost_1_73_0_rc1.tar.bz2
9995e192e68528793755692917f9eb6422f3052a53c5e13ba278a228af6c7acf
 boost_1_73_0_rc1.tar.gz
0909a79524f857ef54570ceef8f397cc0629202532cc997785479c7c08bbc2a4
 boost_1_73_0_rc1.zip

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

I had four failures attempting to build on windows. However, they were atypical in that the build stalled out and would not continue, rather than producing an error. 

The last items in the terminal before stalling out was something like:
D:\ReleaseBuild\bin.v2\boost\bin.v2\libs\wave\build\msvc-14.0\release\link-static\runtime-link-static\threadapi-win32\threading-multi\libboost_wave-variant-vc140-mt-s-x32-1_73-static.cmake
        1 file(s) copied.
common.copy D:\ReleaseBuild\boost_1_73_0\lib32-msvc-14.0\libboost_wave-vc140-mt-s-x32-1_73.lib
D:\ReleaseBuild\bin.v2\boost\bin.v2\libs\wave\build\msvc-14.0\release\link-static\runtime-link-static\threadapi-win32\threading-multi\libboost_wave-vc140-mt-s-x32-1_73.lib
        1 file(s) copied.

It seemed to be generally in wave, however one time it failed in log. This example shows the problem during msvc-14.0, but I believe I also saw it in 14.1 one of the times. I had experienced something similar during the beta build, and after succeeding I was unable to reproduce it on the same computer, somehow related to caching? Very weird, and I don't think we should release while this is ongoing.


On the fifth try, I was able to get a good build for all versions of visual studio I was attempting. 

toolset     arch    compile Link    Execute
msvc-10.0   32      X       X       X
msvc-10.0   64      X       X       X
msvc-11.0   32      X       X       X
msvc-11.0   64      X       X       X
msvc-12.0   32      X       X       X
msvc-12.0   64      X       X       X
msvc-14.0   32      X       X       X
msvc-14.0   64      X       X       X
msvc-14.1   32      X       X       X
msvc-14.1   64      X       X       X
msvc-14.2   32      X       X       X
msvc-14.2   64      X       X       X

Compile means that the b2 command completed without errors
Link means that visual studio was able to link a sample executable to a library (libboost_thread-vcXXX-mt[-gd]-1_XX.lib) generated
Execute means that the linked program executed without errors.

Full build logs can be found here:
https://gist.github.com/teeks99/586e868be64464e474233d20d35de656

Tom