[Python-checkins] bpo-37961: Fix regression in tracemalloc.Traceback.__repr__ (GH-23805)
vstinner
webhook-mailer at python.org
Wed Dec 16 16:38:53 EST 2020
https://github.com/python/cpython/commit/051b9818671625d125dee8198e0d2af5ad4c85b8
commit: 051b9818671625d125dee8198e0d2af5ad4c85b8
branch: master
author: Daniel Hahler <git at thequod.de>
committer: vstinner <vstinner at python.org>
date: 2020-12-16T22:38:32+01:00
summary:
bpo-37961: Fix regression in tracemalloc.Traceback.__repr__ (GH-23805)
Regression in 8d59eb1b66c51b2b918da9881c57d07d08df43b7.
files:
A Misc/NEWS.d/next/Library/2020-12-16-16-16-33.bpo-37961.jrESEq.rst
M Lib/test/test_tracemalloc.py
M Lib/tracemalloc.py
diff --git a/Lib/test/test_tracemalloc.py b/Lib/test/test_tracemalloc.py
index a0037f81b88f2..556656747bbcb 100644
--- a/Lib/test/test_tracemalloc.py
+++ b/Lib/test/test_tracemalloc.py
@@ -85,6 +85,25 @@ def traceback_filename(filename):
return traceback_lineno(filename, 0)
+class TestTraceback(unittest.TestCase):
+ def test_repr(self):
+ def get_repr(*args) -> str:
+ return repr(tracemalloc.Traceback(*args))
+
+ self.assertEqual(get_repr(()), "<Traceback ()>")
+ self.assertEqual(get_repr((), 0), "<Traceback () total_nframe=0>")
+
+ frames = (("f1", 1), ("f2", 2))
+ exp_repr_frames = (
+ "(<Frame filename='f2' lineno=2>,"
+ " <Frame filename='f1' lineno=1>)"
+ )
+ self.assertEqual(get_repr(frames),
+ f"<Traceback {exp_repr_frames}>")
+ self.assertEqual(get_repr(frames, 2),
+ f"<Traceback {exp_repr_frames} total_nframe=2>")
+
+
class TestTracemallocEnabled(unittest.TestCase):
def setUp(self):
if tracemalloc.is_tracing():
@@ -1065,6 +1084,7 @@ def test_stop_untrack(self):
def test_main():
support.run_unittest(
+ TestTraceback,
TestTracemallocEnabled,
TestSnapshot,
TestFilters,
diff --git a/Lib/tracemalloc.py b/Lib/tracemalloc.py
index 69b4170ec8246..cec99c59700fe 100644
--- a/Lib/tracemalloc.py
+++ b/Lib/tracemalloc.py
@@ -226,7 +226,7 @@ def __str__(self):
return str(self[0])
def __repr__(self):
- s = "<Traceback %r" % tuple(self)
+ s = f"<Traceback {tuple(self)}"
if self._total_nframe is None:
s += ">"
else:
diff --git a/Misc/NEWS.d/next/Library/2020-12-16-16-16-33.bpo-37961.jrESEq.rst b/Misc/NEWS.d/next/Library/2020-12-16-16-16-33.bpo-37961.jrESEq.rst
new file mode 100644
index 0000000000000..5b363ad22d6e3
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2020-12-16-16-16-33.bpo-37961.jrESEq.rst
@@ -0,0 +1 @@
+Fix crash in :func:`tracemalloc.Traceback.__repr__` (regressed in Python 3.9).
\ No newline at end of file
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