MSVC: Expression test cases won't compile

[JanosGit]

CL-based builds have been disabled for now. Getting errors like this for all attempts to compile the test cases

D:\a\VCTR\VCTR\test\TestCases\Expressions\Map.cpp(84): fatal error C1001: Internal compiler error. (compiler file 'msc1.cpp', line 1589)
To work around this problem, try simplifying or changing the program near the locations listed above.