[Python-checkins] cpython (2.7): Issue #23838: linecache now clears the cache and returns an empty result on
serhiy.storchaka
python-checkins at python.org
Wed Apr 1 15:59:07 CEST 2015
https://hg.python.org/cpython/rev/d444496e714a
changeset: 95344:d444496e714a
branch: 2.7
parent: 95340:f8358f6e50e7
user: Serhiy Storchaka <storchaka at gmail.com>
date: Wed Apr 01 16:53:53 2015 +0300
summary:
Issue #23838: linecache now clears the cache and returns an empty result on
MemoryError.
files:
Lib/linecache.py | 6 +++++-
Lib/test/test_linecache.py | 16 ++++++++++++++++
Misc/NEWS | 3 +++
3 files changed, 24 insertions(+), 1 deletions(-)
diff --git a/Lib/linecache.py b/Lib/linecache.py
--- a/Lib/linecache.py
+++ b/Lib/linecache.py
@@ -36,8 +36,12 @@
if filename in cache:
return cache[filename][2]
- else:
+
+ try:
return updatecache(filename, module_globals)
+ except MemoryError:
+ clearcache()
+ return []
def checkcache(filename=None):
diff --git a/Lib/test/test_linecache.py b/Lib/test/test_linecache.py
--- a/Lib/test/test_linecache.py
+++ b/Lib/test/test_linecache.py
@@ -124,6 +124,22 @@
self.assertEqual(line, getline(source_name, index + 1))
source_list.append(line)
+ def test_memoryerror(self):
+ lines = linecache.getlines(FILENAME)
+ self.assertTrue(lines)
+ def raise_memoryerror(*args, **kwargs):
+ raise MemoryError
+ with support.swap_attr(linecache, 'updatecache', raise_memoryerror):
+ lines2 = linecache.getlines(FILENAME)
+ self.assertEqual(lines2, lines)
+
+ linecache.clearcache()
+ with support.swap_attr(linecache, 'updatecache', raise_memoryerror):
+ lines3 = linecache.getlines(FILENAME)
+ self.assertEqual(lines3, [])
+ self.assertEqual(linecache.getlines(FILENAME), lines)
+
+
def test_main():
support.run_unittest(LineCacheTests)
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -21,6 +21,9 @@
Library
-------
+- Issue #23838: linecache now clears the cache and returns an empty result on
+ MemoryError.
+
- Issue #23742: ntpath.expandvars() no longer loses unbalanced single quotes.
- Issue #21802: The reader in BufferedRWPair now is closed even when closing
--
Repository URL: https://hg.python.org/cpython
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