.pro parser fails to handle generated SUBDIRS

Our build system, through a set of .pri, generates the list of subdirs that gets included. This is handled just fine by qmake, but Creator's parser fails to handle this. I've attached an example project that replicates the problem yet builds fine from the command line with:

qmake -r
make

But when loading in Creator, all I see in the project view is plugins.pri, test.pro. As a consequence, foo.cpp and bar.cpp are not available, even from the locator, nor are the functions defined within.