[BUG] Global variable treated as local variable by initialization safety guarantee rule

[filipsajdak]

The initialization safety guarantee informs that the global variable is a local variable and that it needs to be initialized before the local variable in the function.

i : int;

main: () -> int = {
    j : int;
    j = 42;
    i = 12;
}

Compile it with cppfront and we get an error:

cppfront % build/external/cppfront external/tests/global_variable.cpp2
external/tests/global_variable.cpp2...
global_variable.cpp2(5,5): error: local variable i must be initialized before j (local variables must be initialized in the order they are declared)
  ==> program violates initialization safety guarantee - see previous errors

Expected behavior: i is a global variable and (according to the error message) should not be considered in checking the order of initialization of the local variables.