about rev-parse's quietness

Hello there.

I'm using a bash function that does a combination of 'ls -l', 'git status', and 'git branch' to give me a quick overview of where I stand in the current git repo.

I planned to extend that function to also list the to-be-pushed commits in the current branch, something like

$ git log --oneline --abbrev-commit --decorate @{u}..

But I don't want to run that 'git log...' if there's no upstream configured for HEAD (and I don't want to see any error!)

OK. That's a task for 'git rev-parse' I thought:

$ up=$(git rev-parse --verify --quiet @{u}) &&
  git log --left-right --oneline --abbrev-commit --decorate $up
fatal: no upstream configured for branch 'master'

Wait. What?

I thought rev-parse with '--verify' and '--quiet' is just that - quiet - in case "...the first argument is not a valid object name" ?

Let's see: $ git rev-parse --verify --quiet master@{xyz} || echo No No

$ git rev-parse --verify --quiet master@{u} || echo No fatal: no upstream configured for branch 'master' No

I don't want to see that error (and I know I could just redirect stdout/stderr to /dev/null ...)

So: Are my expectations about 'rev-parse --verify --quiet' wrong or am I doing
something stupid ?

Thanks,
  Stefan