This is a list of D compiler bugs that affect Tango, and a list of workarounds for them. When a workabout is not available, you generally can downgrade to a compiler that doesn't have the bug.
9259 - Affects the JSON package as of 2.061. Workabout: None.
9356 - Affects the Zip package as of 2.061. Workabout: Compile Tango without -inline.
8561 - Breaks Variant in some usages (mostly using Variant as a key in a hashmap). Workabout: None.