vcs: invalidate repo caches _after_ a push finishes Caches were invalidated right after creating the result iterator, before actually applying the change. Caches would thus be refreshed too early and soon be outdated. This bug was especially seen causing errors with missing revisions when creating PRs right after pushing.

[tox]
minversion = 1.8
envlist = py{26,27}-{pytest,nose}

[testenv]
setenv =
    PYTHONHASHSEED = 0
deps =
    nose: nose
    pytest: pytest
commands =
    nose: nosetests {posargs}
    pytest: py.test {posargs}