[FIX] core: flush env after pre upgrade scripts

In some case, a pre-migration script calls `xml_import.parse` to force
reload a no-update data in pre-script. It is possible that fields are
marked to recompute in the process. The problem is that the reference to
the field added in `env.all.tocompute` won't be the same as the
reference of the same field after calling `registry.setup_models()`,
leading to an infinite loop while recomputing this field, since
`fields.__get__` wont find `self` in `env.all.tocompute`.

This problem was discovered when trying to migrate a database with all
modules installed (no demo data) from 12.0 to 13.0 (for commit
references: http://runbot.odoo.com/runbot/build/1176576 with database
comming from http://runbot.odoo.com/runbot/build/1171714).

This commit adds a check before executing `registry.setup_models()` in
order to log when some fields to compute remain before breaking fields
references, and adds a `flush()` after pre-scripts to fix the current
issue.

X-original-commit: 41b9d810066774736c4077bba1dc9c9fba004f48

0 files changed, 0 insertions, 0 deletions