Issue #7205: Fix a possible deadlock when using a BZ2File object from several threads at once.
diff --git a/Lib/test/test_bz2.py b/Lib/test/test_bz2.py
index 215a04e..f68586d 100644
--- a/Lib/test/test_bz2.py
+++ b/Lib/test/test_bz2.py
@@ -7,6 +7,7 @@
import os
import subprocess
import sys
+import threading
bz2 = import_module('bz2')
from bz2 import BZ2File, BZ2Compressor, BZ2Decompressor
@@ -306,6 +307,23 @@
else:
self.fail("1/0 didn't raise an exception")
+ def testThreading(self):
+ # Using a BZ2File from several threads doesn't deadlock (issue #7205).
+ data = "1" * 2**20
+ nthreads = 10
+ f = bz2.BZ2File(self.filename, 'wb')
+ try:
+ def comp():
+ for i in range(5):
+ f.write(data)
+ threads = [threading.Thread(target=comp) for i in range(nthreads)]
+ for t in threads:
+ t.start()
+ for t in threads:
+ t.join()
+ finally:
+ f.close()
+
class BZ2CompressorTest(BaseTest):
def testCompress(self):