CMake file with add_subdirectory to other cmake file causes debugger to stop with an error.

On OSX 10.10.1, with final version 3.3.0, the debugger does not work anymore when using Cmake (with add_subdirectory() ). Tested it with a simple main.cpp:
#include <iostream>

int main(int argc, char *argv[]) {
int returnValue=0;
std::cout << returnValue;
return (returnValue);
}
Outer Cmake file:
add_subdirectory(mySubProject)

inner Cmake file:
project(blabla)
add_executable(${PROJECT_NAME} main.cpp)

Debugger does not stop at breakpoint and gives a python error.
Used to work in previous versions (including 3.3.0 rc).
Reverted to 3.2.0 and everything works as expected.
3.3.0 only gives an error, when opening the outer cmake project file. Using the Cmake file from the subdirectory directly, works fine.
Exact error:
"Python quit unexpectedly while using the _lldb.so plug-in."