cubicweb-vcsfile #2706946 hg: problems with latest import_content implementation [resolved]

The unicity contraint on revision prevent from doing 'SET R revision NULL' beforere numbering (on Postgresql), and the knownheads should recomputed just before computing 'incoming' revisions.

prioritynormal
typebug
done in1.11.0
load0.250
load left0.000
closed by#fe73c1710bc5 [hg] fixes in import_content (closes #2706946)