Merged revisions 81432 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r81432 | benjamin.peterson | 2010-05-21 16:31:24 -0500 (Fri, 21 May 2010) | 1 line

  ensure the last line has a trailing newline #8782
........

Lib/linecache.py

@@ -133,6 +133,8 @@ def updatecache(filename, module_globals=None):
     except IOError, msg:
 ##      print '*** Cannot open', fullname, ':', msg
         return []
+    if lines and not lines[-1].endswith('\n'):
+        lines[-1] += '\n'
     size, mtime = stat.st_size, stat.st_mtime
     cache[filename] = size, mtime, lines, fullname
     return lines

Lib/test/test_linecache.py

@@ -31,6 +31,11 @@ a = f()
 
 '''
 
+SOURCE_3 = '''
+def f():
+    return 3''' # No ending newline
+
+
 class LineCacheTests(unittest.TestCase):
 
     def test_getline(self):
@@ -63,6 +68,15 @@ class LineCacheTests(unittest.TestCase):
         empty = linecache.getlines('a/b/c/__init__.py')
         self.assertEquals(empty, [])
 
+    def test_no_ending_newline(self):
+        try:
+            with open(support.TESTFN, "w") as fp:
+                fp.write(SOURCE_3)
+            lines = linecache.getlines(support.TESTFN)
+            self.assertEqual(lines, ["\n", "def f():\n", "    return 3\n"])
+        finally:
+            support.unlink(support.TESTFN)
+
     def test_clearcache(self):
         cached = []
         for entry in TESTS:

Misc/NEWS

@@ -55,6 +55,9 @@ C-API
 Library
 -------
 
+- Issue #8782: Add a trailing newline in linecache.updatecache to the last line
+  of files without one.
+
 - Issue #8729: Return NotImplemented from collections.Mapping.__eq__ when
   comparing to a non-mapping.