git diff-index occasionally fails

[ChrisJefferson]

The line:

git diff-index --quiet HEAD -- ||
    error "uncommitted changes detected 2"

Occasionally fails on mac. The problem seems very sensitive -- doing a git status or a sleep 1 just before seems to fix the problem.

[ChrisJefferson]

git update-index --refresh -- before running git diff-index seems to clear up the problem reliably.

[olexandr-konovalov]

After the fix, I am having an error:

error: --refresh: does not exist and --remove not passed
fatal: Unable to process path --refresh

[fingolfin]

Fixed the fix.
@alex-konovalov next time, please submit a new issue. I only saw this comment on a closed issue by pure chance