Discovering the cause of Vim exit status -

on running:

vim /tmp/blah :q echo $? 

i exit status of 1. breaking various things including git. if run vim without vimrc:

vim -u none /tmp/blah :q echo $? 

i exit status of 0. use pathogen disables plugins. have suggestion efficiently determining cause of exit status? i'm aware of running vim verbosely , logging file. should looking specific in file?

if there method of finding exact line determines exit status love know of searching around didn't turn up.

finally found command in help: :cq[uit]. after verbose logging, search \<cq\%[uit]\>.

update: there methods alter exit status using vim compiled interpreters support: @ least, following works:

python import sys python sys.exit(1) " (same python3)  perl exit 1 

i not know other languages enough write here examples of code quit vim different exit status. note such commands inside files sourced using :pyfile, :rubyfile , other :*file should work, code in modules not distributed plugin.

i think efficient way here @ point disabling plugins until find source of problem.