Здравствуйте, szag, Вы писали:

S>У меня не повторяется VS2015 U1

воспроизводится на http://rextester.com/l/cpp_online_compiler_visual

Error(s):
source_file.cpp(39): error C2062: type 'int' unexpected
source_file.cpp(43): error C2065: 'folders_for_delete': undeclared identifier
source_file.cpp(43): error C2228: left of '.begin' must have class/struct/union
source_file.cpp(43): note: type is 'unknown-type'
source_file.cpp(43): error C2228: left of '.end' must have class/struct/union
source_file.cpp(43): note: type is 'unknown-type'
source_file.cpp(46): error C4430: missing type specifier — int assumed. Note: C++ does not support default-int
source_file.cpp(46): error C2365: 'std::for_each': redefinition; previous definition was 'function'
C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\INCLUDE\algorithm(29): note: see declaration of 'std::for_each'
source_file.cpp(46): fatal error C1903: unable to recover from previous error(s); stopping compilation
Internal Compiler Error in C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\cl.exe. You will be prompted to send an error report to Microsoft later.
INTERNAL COMPILER ERROR in 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\cl.exe'
Please choose the Technical Support command on the Visual C++
Help menu, or open the Technical Support help file for more information

там версия как раз VS2015U1

Microsoft (R) C/C++ Optimizing Compiler Version 19.00.23506 for x86