enttest.Open is not goroutine-safe

[tmc]

Concurrent calls to enttest.Open() (which you might encounter when parallelizing test runs via t.Parallel()) encounter a data race in the lazy/unsychronized initialization of t.columns in func (m *Migrate) setupTable(t *Table) {.

[a8m]

Hey @tmc and thanks for reporting this. I can work around this by either adding a lock to the migration or copying the tables. I think the latter is preferred but requires more work.

I'll give it a try and update you.