self._mixers[0] Index out of range on start

[foxbunny]

On Arch Linux x86_64, gmixer version 1.3, I get an IndexError exception when I try to start gmixer.

Here's the traceback.

Traceback (most recent call last):
  File "/usr/bin/gmixer", line 1168, in <module>
    GMixer(options.daemon, options.custom_mixer_cmd, options.pixmap)
  File "/usr/bin/gmixer", line 592, in __init__
    self._load_defaults()
  File "/usr/bin/gmixer", line 749, in _load_defaults
    self._current_mixer = self._mixers[0]
IndexError: list index out of range

It occurs in:

def _load_defaults(self):
        # Prefer alsamixer by default
        for mixer in self._mixers:
            if mixer.get_factory().get_name() == "alsamixer":
                self._current_mixer = mixer
                break
        else:
            self._current_mixer = self._mixers[0]

The for block is obviously wrong here, because it improperly handles the case where ``self._mixers`` is empty. There should be a test first to see if ``self._mixers`` is ``True``.

    if self._mixers:
        for mixer in self._mixers:
            if mixer.get_factory().get_name() == "alsamixer":
                self._current_mixer = mixer
                break
        else:
            self._current_mixer = self._mixers[0]
    else:
        # print a helpful error message or find an alternative way

As for the issue, I have ``alsamixer`` run just fine, so I find it odd that gmixer is not able to find any mixers at all. Why is this happening?

[foxbunny (bg-branko)]

I've just tried this with the bzr version (@ Mon May 24 01:38:55 CEST 2010), and the results are the same.