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Issue #5057: fix a bug in the peepholer that led to non-portable pyc files between narrow and wide builds while optimizing BINARY_SUBSCR on non-BMP chars (e.g. u"\U00012345"[0]).

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This commit is contained in:
Ezio Melotti 2011-04-15 16:14:04 +03:00
parent ddaea1c38a
commit c283a85e12
3 changed files with 40 additions and 0 deletions
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18
Lib/test/test_peepholer.py
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@ -137,6 +137,24 @@ class TestTranforms(unittest.TestCase):
asm = dis_single('a="x"*1000')
self.assertIn('(1000)', asm)
def test_binary_subscr_on_unicode(self):
# valid code get optimized
asm = dis_single('u"foo"[0]')
self.assertIn("(u'f')", asm)
self.assertNotIn('BINARY_SUBSCR', asm)
asm = dis_single('u"\u0061\uffff"[1]')
self.assertIn("(u'\\uffff')", asm)
self.assertNotIn('BINARY_SUBSCR', asm)
# invalid code doesn't get optimized
# out of range
asm = dis_single('u"fuu"[10]')
self.assertIn('BINARY_SUBSCR', asm)
# non-BMP char (see #5057)
asm = dis_single('u"\U00012345"[0]')
self.assertIn('BINARY_SUBSCR', asm)
def test_folding_of_unaryops_on_constants(self):
for line, elem in (
('`1`', "('1')"), # unary convert