BUG: Inconsistent behavior for `git stash push`

Hello,

I found this issue with inconsistent exit codes.

Expected 'false' return code when I trying to stash staged changes when *they does not exists*: $ git stash push -S && echo "YES" No staged changes

Unexpected 'true' return code when I trying to stash changes when *they does not exists*: $ git stash && echo "YES" No local changes to save YES

I expect that "YES" here should not be printed.

Could it be possible to return 'false' exit code for second case? Thank you.