Why is there no "fix proposed" status?

I recently came across a bug in a project which I am not a developer for.

I tracked down the problem to a simple mistake in the code, produced and tested a patch, and attached it to the bug report.

This still leaves the bug at the "Confirmed" stage. It is one of a large number of bugs in this state, most of which the developers seem to have yet to look at.

It would be nice to be able to bring attention to the fact that a fix is already available; it just needs a developer to commit it to the repository. For a developer looking through the bugs in their package, bugs in this state should be quicker to tackle than "Confirmed" or "Triaged" bugs, where the cause is unknown or the fix has yet to be written.

But there is no bug status available between "In progress" (which discourages developers from looking at the report, because someone else is tackling it) and "Fix committed" (which is not yet true). It seems that a "Fix proposed" or perhaps "Fix contributed" status would be a useful intermediate status for the not uncommon scenario where a fix is contributed by a user.

I would consider filing this as a Launchpad wishlist bug, but I wanted to ask first whether this is an issue that has been discussed already and rejected for some reason.