Source tarball contains a copy of itself in ./test

There seems to be an almost complete copy of the source tarball files (minus the test directory itself) inside the ./test directory, e.g.:

./mariadb_client-2.0.0-src/libmariadb/libmariadb.c
./mariadb_client-2.0.0-src/test/mariadb_client-2.0.0-src/libmariadb/libmariadb.c

Not sure whether this is intentional, but as there is no such ./test subdir in bzr and as building with the ./test subdir removed works just fine I assume this was a packaging oversight?

(... insert usual rant about lack of functionally equivalents to automake "make dist" and "make distcheck" in CMake here ...)