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bpo-41531: Fix compilation of dict literals with more than 0xFFFF elements (GH-21850) (GH-22107)

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(cherry picked from commit c51db0ea40)

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
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Miss Islington (bot) 2020-09-04 16:38:50 -07:00 • committed by GitHub
parent 242eac1f04
commit d64d78be20
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3 changed files with 13 additions and 1 deletions
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10
Lib/test/test_compile.py
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@ -750,6 +750,16 @@ if 1:
self.assertEqual(None, opcodes[0].argval)
self.assertEqual('RETURN_VALUE', opcodes[1].opname)
def test_big_dict_literal(self):
# The compiler has a flushing point in "compiler_dict" that calls compiles
# a portion of the dictionary literal when the loop that iterates over the items
# reaches 0xFFFF elements but the code was not including the boundary element,
# dropping the key at position 0xFFFF. See bpo-41531 for more information
dict_size = 0xFFFF + 1
the_dict = "{" + ",".join(f"{x}:{x}" for x in range(dict_size)) + "}"
self.assertEqual(len(eval(the_dict)), dict_size)
class TestExpressionStackSize(unittest.TestCase):
# These tests check that the computed stack size for a code object
# stays within reasonable bounds (see issue #21523 for an example