fix: race condition on data file shouldn't break combining. #1522

1 files changed, 1 insertions, 1 deletions

diff --git a/coverage/sqldata.py b/coverage/sqldata.py
index eced1616..4baea331 100644
--- a/coverage/sqldata.py
+++ b/coverage/sqldata.py
@@ -289,6 +289,7 @@ class CoverageData(AutoReprMixin):
         with self._dbs[threading.get_ident()] as db:
             try:
                 row = db.execute_one("select version from coverage_schema")
+                assert row is not None
             except Exception as exc:
                 if "no such table: coverage_schema" in str(exc):
                     self._init_db(db)
@@ -299,7 +300,6 @@ class CoverageData(AutoReprMixin):
                         )
                     ) from exc
             else:
-                assert row is not None
                 schema_version = row[0]
                 if schema_version != SCHEMA_VERSION:
                     raise DataError(