Google App Engine Launcher Crashes On Mac

My Google App Engine Launcher crashes on my mac with SIGSEGV. When I run a Python project on the launcher, it starts running. But the launcher crashes when the project receives HT

Solution 1:

I resolved by myself.

The above problem was disappeared when I removed database files made by App Engine Launcher.

The location of the database files were discussed in the following page.

Where is my local App Engine datastore?

Checking "Clear database on launch" option did not solved the problem.