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-rw-r--r--lldb/packages/Python/lldbsuite/test/lldbtest.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/lldb/packages/Python/lldbsuite/test/lldbtest.py b/lldb/packages/Python/lldbsuite/test/lldbtest.py
index 9d0c4e2559f..e52c5bf5eb7 100644
--- a/lldb/packages/Python/lldbsuite/test/lldbtest.py
+++ b/lldb/packages/Python/lldbsuite/test/lldbtest.py
@@ -1413,8 +1413,8 @@ class Base(unittest2.TestCase):
self.log_basename = self.getLogBasenameForCurrentTest()
session_file = "{}.log".format(self.log_basename)
- unbuffered = 0 # 0 is the constant for unbuffered
- self.session = open(session_file, "w", unbuffered)
+ # Python 3 doesn't support unbuffered I/O in text mode. Open buffered.
+ self.session = open(session_file, "w")
# Optimistically set __errored__, __failed__, __expected__ to False
# initially. If the test errored/failed, the session info
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