Sorry but .obj and .lib files are useless to find compiler issue.
Is this still reproduce with 2.066, 2.066.1, or git-head?
Comment #2 by dlang-bugzilla — 2017-06-26T13:56:44Z
Closing, as there has been no reply in over 2 years.
If you can provide a complete self-contained test case starting from D source code, please reopen.