line 274 of `\data\skeletons\d.m4` ` private int yycode_;` needs to be replaced with ` int yycode_;` The problem is while aliases to private things are supported in D, the `alias *X* this` construct does not. Not even in the same file (which is not not normal for things declared private in D and may be a bug). Regardless, what happens is it won't build on dmd (the D reference compiler), nor ldc2 (the popular llvm D implementation) because it uses the struct in a call to format later in the generated code which then expands to access the member.
