Bug 11694 – std.traits.SetFunctionAttributes does not conserve constness

the code: import std.traits; class Z { string a() immutable { return " 1"; } } pragma(msg ,typeof(&Z.a)); pragma(msg, SetFunctionAttributes!(typeof(&Z.a), functionLinkage!(typeof(&Z.a)), functionAttributes!(typeof(&Z.a)))); void main() {} prints out string function() immutable string function() rather than the expected string function() immutable string function() immutable