Proton revision 1627945 barfs on cmake -DCMAKE_BUILD_TYPE=Debug ..

I just updated to r1627945 and when I do
cmake -DCMAKE_BUILD_TYPE=Debug ..
make

I get:

Linking C shared library libqpid-proton.so
CMakeFiles/qpid-proton.dir/src/codec/codec.c.o: In function
`pni_node_fields':
/home/fadams/qpid/qpid-trunk/proton/proton-c/src/codec/codec.c:99:
undefined reference to `pn_data_node'
CMakeFiles/qpid-proton.dir/src/codec/codec.c.o: In function
`pni_node_index':
/home/fadams/qpid/qpid-trunk/proton/proton-c/src/codec/codec.c:117:
undefined reference to `pn_data_node'
CMakeFiles/qpid-proton.dir/src/codec/codec.c.o: In function
`pni_inspect_enter':
/home/fadams/qpid/qpid-trunk/proton/proton-c/src/codec/codec.c:254:
undefined reference to `pn_data_node'
/home/fadams/qpid/qpid-trunk/proton/proton-c/src/codec/codec.c:256:
undefined reference to `pn_data_node'
CMakeFiles/qpid-proton.dir/src/codec/codec.c.o: In function
`pni_next_nonnull':
/home/fadams/qpid/qpid-trunk/proton/proton-c/src/codec/codec.c:303:
undefined reference to `pn_data_node'
CMakeFiles/qpid-proton.dir/src/codec/codec.c.o:/home/fadams/qpid/qpid-trunk/proton/proton-c/src/codec/codec.c:315:
more undefined references to `pn_data_node' follow
collect2: ld returned 1 exit status
make[2]: *** [proton-c/libqpid-proton.so.2.0.0] Error 1
make[1]: *** [proton-c/CMakeFiles/qpid-proton.dir/all] Error 2
make: *** [all] Error 2

when I do:
rm CMakeCache.txt
cmake ..
make

It makes fine, so RelWithDebInfo seems OK, but Debug not

Not a show-stopper, but a bit weird.......
Frase