Develop is broken on MSVC (b2 issue?)

From: Antony Polukhin (antoshkka_at_[hidden])
Date: 2021-01-03 18:01:20

I see a bunch of CI failures https://apolukhin.github.io/en/developer.html
for different versions of MSVC. There are some complains on 'cl':

compile-c-c++
..\..\..\bin.v2\libs\type_index\test\track_13621.test\msvc-9.0\release\threading-multi\track_13621.obj
'cl' is not recognized as an internal or external command,
operable program or batch file.

 call "..\..\..\bin.v2\standalone\msvc\msvc-9.0\msvc-setup.bat" amd64 >nul
cl /Zm800 -nologo "track_13621.cpp"
-Fo"..\..\..\bin.v2\libs\type_index\test\track_13621.test\msvc-9.0\release\threading-multi\track_13621.obj"
-TP -DBOOST_TRAVISCI_BUILD /wd4675 /EHs /GR /O2 /Ob2 /W3 /MD /Zc:forScope
/Zc:wchar_t /favor:blend -c -DBOOST_ALL_NO_LIB=1 -DNDEBUG "-I..\..\.."
...failed compile-c-c++
..\..\..\bin.v2\libs\type_index\test\track_13621.test\msvc-9.0\release\threading-multi\track_13621.obj...

Is that a known issue?