eclipse+pydev breakpoint not work with the latest cloned web2py

[Yibing Liu]

My computer is win7 x64. I am using eclipse(4.6.2) ,pydev(5.5.0), python(2.7.13) and the web2py latest cloned from the github. Compared with the 2.14.6 stable version web2py, the latest cloned web2py has many additonal files which I guess may be used for compiling and debugging. However when I debug my application which based on the latest cloned web2py, the breakpoint I set in my controller/default/index not stop. Only the breakpoint in the web2py.py can work. This is very confusing. So I change the web2py to the 2.14.6 stable version and the breakpoint is ok. What should I do with the latest cloned web2py to make the breakpoint work under the eclipse+pydev?