Created attachment 364091 [details]
Two simple functions that don't compile

In the version 0.36 and 0.38 the vala compiler interpret variables with parenthesis around it as a caster to objects with the same name of the variable.

This doesn't happen in the version 0.34 from Ubuntu 17.04 where the compile works as expected.

Is appended a file with two function that generate errors.

The functions:
int posix_wexitstatus(int status) {
            return (((status) & 0xff00) >> 8);
}

int multiplication(int a, int b){
        double alpha = 0.5;
        return (alpha)*a*b;
}

The errors:
bug.vala:3.16-3.21: error: The type name `status' could not be found
            return (((status) & 0xff00) >> 8);
                      ^^^^^^
bug.vala:8.10-8.14: error: The type name `alpha' could not be found
        return (alpha)*a*b;
                ^^^^^
Compilation failed: 2 error(s), 0 warning(s)
Makefile:2: recipe for target 'all' failed
make: *** [all] Error 1

In both cases (status) and (alpha) were previously instantiated and declared as int and double respectively.