On Friday, 4 November 2016 at 23:38:47 UTC, sarn wrote:
I suggest trying it with the latest dmd and filing a bug report. Taking a quick look at the library code (https://github.com/dlang/phobos/blob/master/std/variant.d), it *seems* like everything uses templates and functions returning auto, so the pureness of visit should be inferred if possible.
Just tried it with 2.072, and I get the same error, so I've submitted a bug report: https://issues.dlang.org/show_bug.cgi?id=16662
