list of symbolic versions does not honor default version

[xdelaruelle]

When resolving one module name with advanced version specifiers enabled and a list of versions specified, if defined version list is composed of symbolic versions and default module version is part of it, this default version is not returned whereas it is expected to be, for instance to load the default version of the module.

Create modulefiles to reproduce the issue:

$ cat mp/mod/1
#%Module
$ cat mp/mod/2
#%Module
$ cat mp/mod/.modulerc
#%Module
module-version /1 default
module-version /2 new
$ module config advanced_version_spec 1

How to reproduce with this setup:

$ module av -t mod@default,new
/home/xa/devel/modules/mp:
mod/1(default)
mod/2(new)
$ module load -v mod@default,new
Loading mod/2

Here mod/2 is returned whereas default module is mod/1.