errors in compiling the svn repository

Hello the list, I have a little problem when compiling the current release. Arch : linux x86_64

/tmp/genode/os/src/server/rom_loopdev/main.cc:208: erreur: cannot allocate an object of abstract type ‘Block::Session_component’ /tmp/genode/os/src/server/rom_loopdev/main.cc:34: note: because the following virtual functions are pure within ‘Block::Session_component’:

The same error appears at least in : os/src/test/fb_block_adapter and os/src/drivers/atapi directories.

/stephane