"snap run --shell alias" doesn't work

[Zygmunt Krynicki]

Having used:

$ sudo snap install --classic --unaliased go_12 --channel=1.12/stable
$ sudo snap alias go_12 go-1.12

I can succesfully run:

snap run go-1.12 version

But I cannot run:

snap run --shell go-1.12

As this confuses the runner.

[Claudio Matsuoka (cmatsuoka)]

For consistency, shouldn't non-parallel install aliases also work with `snap run`?

[Zygmunt Krynicki (zyga)]

I think so but it could be regarded as a separate bug. A quick peek at the run code shows how the type of interaction is fractured and how unaliasing and instance analysis is not consistent. It is possible to fix it all in one go, perhaps, but it's always safer to just do it one by one.