-e: when trying to compile an empty project it will fail with errors

-repro:
--install Editor with Windows Standalone Il2CPP support (starts with 2018.1a6)
--create new project
--open build settings
--go to player settings
--switch Scripting Backend to Il2CPP
--start build
--NOTICE it fails compiling with errors:

Unhandled Exception: Unity.IL2CPP.Building.BuilderFailedException: giconv.c
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\glib.h(142) : error C2054: expected '(' to follow 'inline'
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\glib.h(142) : error C2085: 'monoeg_strdup' : not in formal parameter list
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\glib.h(142) : error C2143: syntax error : missing ';' before '{'
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(904) : warning C4267: '=' : conversion from 'size_t' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(928) : warning C4244: '=' : conversion from '__int64' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(931) : warning C4267: '=' : conversion from 'size_t' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(965) : warning C4244: '=' : conversion from '__int64' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(998) : warning C4267: '=' : conversion from 'size_t' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(1017) : warning C4244: '=' : conversion from '__int64' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(1032) : warning C4267: '=' : conversion from 'size_t' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(1035) : warning C4244: '=' : conversion from '__int64' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(1097) : warning C4244: '=' : conversion from '__int64' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(1112) : warning C4244: '=' : conversion from '__int64' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(1115) : warning C4267: '=' : conversion from 'size_t' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(1178) : warning C4244: '=' : conversion from '__int64' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(1193) : warning C4244: '=' : conversion from '__int64' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(1196) : warning C4267: '=' : conversion from 'size_t' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(1272) : warning C4267: '=' : conversion from 'size_t' to 'glong', possible loss of data
D:\2018.1.0a7_093ff45d2bc9\Editor\Data\MonoBleedingEdge\source\eglib\src\giconv.c(1334) : warning C4267: '=' : conversion from 'size_t' to 'glong', possible loss of data