D-Programming-Language/phobos — pull request #602 by klickverbot (2012-05-23 16:52:35+00:00)
Title: Issue 7796 - std.typecons.Unique is using writeln without importing std.stdio.

With Unique being a template, commit 4ee4efe (pull request #601) caused the messages to be printed for unittest builds of client code as well.