Bug#797451: opam FTBFS with dose3 4.0

[Johannes Schauer <josch@debian.org>]

Source: opam
Version: 1.2.2-2
Severity: serious
Justification: fails to build from source (but built successfully in the past)
Control: block -1 by 797448

Hi,

opam FTBF after the upload of dose3 4.0:

ocamlfind ocamlc -package unix,extlib,re,re.emacs,re.str,re.perl,re.pcre,re.glob,cmdliner,ocamlgraph,cudf,dose3,jsonm -c -g -w +a-4-9-32-41-44-45-48 -bin-annot -short-paths -I core -I solver -I repositories -I client -I core/ core/opamVersion.ml
File "core/opamVersion.ml", line 30, characters 2-24:
Error: Unbound module Debian.Version
make[7]: *** [core/opamVersion.cmo] Error 2
.../OCamlMakefile:1076: recipe for target 'core/opamVersion.cmo' failed
make[7]: Leaving directory '/«PKGBUILDDIR»/src'

this is probably due to dose3 4.0 introducing a new module Versioning
which takes over for Debian.Version. It also misses an entry in META for
that new module, so blocking by #797448.

Uploading a fixed version of dose3 4.0 with a proper META is also
blocked by the extlib 1.7.0 upload.

Thanks!

cheers, josch