Sometime between 3-6AM central time today a change was checked in that is causing all the regression tests I run (Windows/Visual Studio + Linux/GCC+Clang on both master and develop) to fail. They all have the following at the end of their results file:

notice: [lzma] lzma is already configured 
error: at ../libs/predef/test/build.jam:47 
error: Attempt to redeclare already registered project id '/test'. 
error: Original project: 
error:     Name: Jamfile</var/boost/run/boost_root/libs/beast/test> 
error:     Module: Jamfile</var/boost/run/boost_root/libs/beast/test> 
error:     Main id: /test 
error:     File: ../libs/beast/test/Jamfile 
error:     Location: ../libs/beast/test 
error: New project: 
error:     Module: Jamfile</var/boost/run/boost_root/libs/predef/test> 
error:     File: ../libs/predef/test/build.jam 
error:     Location: ../libs/predef/test

Tom