diff --git a/src/reports.c b/src/reports.c
index 6c66bb420..99590b2ae 100644
--- a/src/reports.c
+++ b/src/reports.c
@@ -1769,6 +1769,7 @@ static variant var_copy_regions(variant x)
         arg_regions *dst;
 
         x.v = dst = malloc(sizeof(arg_regions));
+        assert(dst);
         dst->nregions = src->nregions;
         src->nregions = 0;
         dst->regions = src->regions;
diff --git a/vs2019-build.bat b/vs2019-build.bat
new file mode 100644
index 000000000..299778303
--- /dev/null
+++ b/vs2019-build.bat
@@ -0,0 +1,19 @@
+@ECHO OFF
+IF "%WIN32_DEV%" == "" SET WIN32_DEV="C:\Libraries"
+SET CMAKE_ROOT=%ProgramFiles%\CMake
+IF "%LUA_DEV%" == "" SET LUA_DEV="%ProgramFiles(x86)%/Lua/5.1"
+SET VSVERSION=16
+SET SRCDIR=%CD%
+REM CD ..
+REM SET ERESSEA=%CD%
+REM CD %SRCDIR%
+
+IF exist build-vs%VSVERSION% goto HAVEDIR
+mkdir build-vs%VSVERSION%
+:HAVEDIR
+cd build-vs%VSVERSION%
+IF NOT EXIST CMakeCache.txt GOTO NOCACHE
+DEL CMakeCache.txt
+:NOCACHE
+"%CMAKE_ROOT%\bin\cmake.exe" -A Win32 -G "Visual Studio %VSVERSION%" -DCMAKE_PREFIX_PATH="%LUA_DEV%;%WIN32_DEV%" -DCMAKE_MODULE_PATH="%SRCDIR%/cmake/Modules" -DCMAKE_SUPPRESS_REGENERATION=TRUE ..
+PAUSE