Rubber alias directive does not work in nested inputs

[Matthias Braun]

An alias directive of the form "% rubber: alias blabla input" does not work when it is encountered in a "deep include" i.e. more than 1 \input was followed to find the file with the directive.

[Matthias Braun (matthias-braun-kit)]

Added an example to demonstrate the bug. When you run rubber with -vv on a.tex then you'll see that the dependency b.tex is not picked up (and consequently a.pdf is not rebuild if it exists but b.tex is newer).
Interestingly the error disappears when you \usepackage{style/myinput} in a.tex instead of only doing it in style/bla.sty.

[Matthias Braun (matthias-braun-kit)]

(this happens with a bazar checkout from today)