Build errors, invalid casts

[susnux]

I try to compile this project for your updated version of abagames-tumiki-fighters.
But when trying to build it I get following error with ldc2 (0.16.1):

/usr/bin/ldc2  -wi -I=/home/abuild/rpmbuild/BUILD/BulletML-20141116/src   -of=CMakeFiles/bulletml.dir/runner.d.o -c /home/abuild/rpmbuild/BUILD/BulletML-20141116/src/bulletml/runner.d
[   50s] /usr/include/d/std/variant.d(2230): Error: cannot implicitly convert expression (variant.peek()) of type const(Bullet)* to Bullet*
[   50s] /usr/include/d/std/variant.d(2230): Error: cannot implicitly convert expression (variant.peek()) of type const(Action)* to Action*
[   50s] /usr/include/d/std/variant.d(2230): Error: cannot implicitly convert expression (variant.peek()) of type const(Fire)* to Fire*
[   50s] /usr/include/d/std/variant.d(2087): Error: template instance bulletml.runner.GroupRunner.this.visitImpl!(false, const(VariantN!(152LU, Bullet, Action, Fire)), delegate (Action action)
[   50s] {
[   50s] this.runners ~= cast(BulletMLRunner)new ActionRunner(manager, orientation, action);
[   50s] }
[   50s] , function ()
[   50s] {
[   50s] }
[   50s] ) error instantiating
[   50s] /home/abuild/rpmbuild/BUILD/BulletML-20141116/src/bulletml/runner.d(93):        instantiated from here: tryVisit!(const(VariantN!(152LU, Bullet, Action, Fire)))
[   50s] /home/abuild/rpmbuild/BUILD/BulletML-20141116/src/bulletml/runner.d(344): Warning: statement is not reachable
[   50s] /home/abuild/rpmbuild/BUILD/BulletML-20141116/src/bulletml/runner.d(344): Warning: statement is not reachable
[   50s] /home/abuild/rpmbuild/BUILD/BulletML-20141116/src/bulletml/runner.d(507): Warning: statement is not reachable
[   50s] src/bulletml/CMakeFiles/bulletml.dir/build.make:87: recipe for target 'src/bulletml/CMakeFiles/bulletml.dir/runner.d.o' failed

[susnux]

With dmd (2) it looks like this:

/usr/bin/dmd  /home/abuild/rpmbuild/BUILD/BulletML-20141116/src/bulletml/runner.d -wi -I/home/abuild/rpmbuild/BUILD/BulletML-20141116/src    -c -ofCMakeFiles/bulletml.dir/runner.d.o
[   32s] /usr/include/dlang/dmd-2.069.2/phobos/std/variant.d(2256): Error: function literal __lambda3 (Action action) is not callable using argument types (const(Action))
[   32s] /usr/include/dlang/dmd-2.069.2/phobos/std/variant.d(2256): Error: cannot return non-void from void function
[   32s] /usr/include/dlang/dmd-2.069.2/phobos/std/variant.d(2095): Error: template instance bulletml.runner.GroupRunner.this.visitImpl!(false, const(VariantN!(76u, Bullet, Action, Fire)), delegate (Action action)
[   32s] {
[   32s] this.runners ~= cast(BulletMLRunner)new ActionRunner(manager, orientation, action);
[   32s] }
[   32s] , function ()
[   32s] {
[   32s] }
[   32s] ) error instantiating
[   32s] /home/abuild/rpmbuild/BUILD/BulletML-20141116/src/bulletml/runner.d(93):        instantiated from here: tryVisit!(const(VariantN!(76u, Bullet, Action, Fire)))
[   32s] /home/abuild/rpmbuild/BUILD/BulletML-20141116/src/bulletml/runner.d(344): Warning: statement is not reachable
[   32s] /home/abuild/rpmbuild/BUILD/BulletML-20141116/src/bulletml/runner.d(344): Warning: statement is not reachable
[   32s] /home/abuild/rpmbuild/BUILD/BulletML-20141116/src/bulletml/runner.d(507): Warning: statement is not reachable
[   32s] /home/abuild/rpmbuild/BUILD/BulletML-20141116/src/bulletml/parser.d(7): Deprecation: module std.stream is deprecated - It will be removed from Phobos in October 2016. If you still need it, go to https://github.com/DigitalMars/undeaD
[   32s] /home/abuild/rpmbuild/BUILD/BulletML-20141116/src/bulletml/parser.d(7): Deprecation: module std.stream is deprecated - It will be removed from Phobos in October 2016. If you still need it, go to https://github.com/DigitalMars/undeaD

[mathstuf]

Regression? It works with gdc 2.065, but that line in std.variant hasn't changed. Did things get stricter?

[mathstuf]

Also, Tumiki Fighters needs more work. Help greatly appreciated though!