On Saturday, 11 January 2014 at 21:16:55 UTC, Timon Gehr wrote:
It is an implementation bug. Implicit conversion to immutable is only supposed to work for strongly pure functions.
Can someone that knows all the details of the purity strength semantic differences please open a PR to get some documentation in the spec?
I've updated this bug with a comment: https://d.puremagic.com/issues/show_bug.cgi?id=7456
