stash@{1} is ambiguous?

I'm trying to get info about my stash, but git is telling me that stash@{0} and stash@{1} are ambiguous. git stash list works fine, and .git/logs/refs/stash seems to have the appropriate content (not that I'm an expert on git internals).

% git stash list
stash@{0}: On master: two
stash@{1}: On master: one
% git stash show stash@{1}
fatal: ambiguous argument 'stash@1': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions

Just plain git stash show works fine. So why are the names that git stash list gives me considered ambiguous?

Your shell is eating your curly brackets, so while you say stash@{1}, git sees stash@1 and that makes no sense to it. Quote the argument (use git stash apply "stash@{1}" or git stash apply stash@"{1}"; quoting either way will work) or reconfigure your shell to only expand curly brackets when there is a comma between them (zsh can be configured either way, bash only expands curly brackets with comma or range between them, other shells may behave one or other way).

Hi there I had the same thing happen to me. Easiest way of fix it was:

$ git stash apply stash@"{2}"

I'm using a windows git shell.

If you have this error while working in Emacs with Magit on Windows (like me)
I hope this quick solution will help you:

(if (eq system-type 'windows-nt)
    (defadvice magit-run-git (before magit-run-git-win-curly-braces (&rest args) activate)
      "Escape {} on Windows"
      (setcar (nthcdr 2 args) 
              (replace-regexp-in-string "{\\([0-9]+\\)}" "\\\\{\\1\\\\}" (elt args 2)))
    )
  )

This will quote {} in a 3rd parameter in ("stash", "cmd", "stash@{0}") which is run by magit-run-git