Valgrind compiled from source no info displayed on Mac

Hi, i find two ugly bugs in qt creator in mac:

my os is lion 10.7.3, i installed the offline bundled version of qt.

i compile valgrind from source, set the path in the qt creator setting, valgrind works fine when i invoke it in terminator. But when i click valgrind memory analytheze, it run my app, but at last, the qt creator console only tell me that my app crashed, no memory leaking info displayed;