diff options
Diffstat (limited to 'coverage/sqldata.py')
| -rw-r--r-- | coverage/sqldata.py | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/coverage/sqldata.py b/coverage/sqldata.py index 9291bddd..fe32dcdc 100644 --- a/coverage/sqldata.py +++ b/coverage/sqldata.py @@ -662,7 +662,12 @@ class Sqlite(SimpleReprMixin): # has non-ascii characters in it. Opening a relative file name avoids # a problem if the current directory has non-ascii. filename = os.path.relpath(self.filename) - self.con = sqlite3.connect(filename) + # It can happen that Python switches threads while the tracer writes + # data. The second thread will also try to write to the data, + # effectively causing a nested context. However, given the indempotent + # nature of the tracer operations, sharing a conenction among threads + # is not a problem. + self.con = sqlite3.connect(filename, check_same_thread=False) # This pragma makes writing faster. It disables rollbacks, but we never need them. # PyPy needs the .close() calls here, or sqlite gets twisted up: |