Help needed: Tests failed While replacing char array with strbuf in bulk-checkin.c

Hi , I am trying do complete the microproject 4, inorder to apply to GSOC. I have made the below changes:

https://gist.github.com/anhsirksai/9334565

Post my changes compilation is succes in the source directory. But when I ran the tests[make in t/ directory] my tests are failing saying

"
  free(): invalid pointer: 0x3630376532353636 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x7eb96)[0x2b5f3b540b96]
/home/saikrishna/Desktop/libcloud-0.14.1/sai/git/git[0x4fb829]
/home/saikrishna/Desktop/libcloud-0.14.1/sai/git/git[0x47d425]
/home/saikrishna/Desktop/libcloud-0.14.1/sai/git/git[0x4064ad]
/home/saikrishna/Desktop/libcloud-0.14.1/sai/git/git[0x405a04]
/home/saikrishna/Desktop/libcloud-0.14.1/sai/git/git[0x404cbd]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x2b5f3b4e376d]
/home/saikrishna/Desktop/libcloud-0.14.1/sai/git/git[0x405109]
"

Can some one please help me with the memory allacation and strbuf_release()

Thanks, --sai krishna