While assumeSorted is marked as @nogc in release mode, while developing this makes it so that any range based code that works with assumeSorted cannot be marked as @nogc, which is especially bad for end-user functions but also hurts Phobos.
https://github.com/D-Programming-Language/phobos/pull/3669
Commit pushed to master at https://github.com/D-Programming-Language/phobos https://github.com/D-Programming-Language/phobos/commit/3fb4a9eaeaa68126341bf82082926ee4e96c1871 fix issue 15003
Commit pushed to stable at https://github.com/D-Programming-Language/phobos https://github.com/D-Programming-Language/phobos/commit/3fb4a9eaeaa68126341bf82082926ee4e96c1871 fix issue 15003