bpo-42562: Fix issue when dis failed to parse function that has no line numbers (GH-23632)

Fix issue when dis failed to parse function that has only annotations
This commit is contained in:
Yurii Karabas 2020-12-04 17:20:53 +02:00 committed by GitHub
parent db68544122
commit f24b8101a0
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 20 additions and 1 deletions

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@ -384,7 +384,7 @@ def _disassemble_bytes(code, lasti=-1, varnames=None, names=None,
constants=None, cells=None, linestarts=None,
*, file=None, line_offset=0):
# Omit the line number column entirely if we have no line number info
show_lineno = linestarts is not None
show_lineno = bool(linestarts)
if show_lineno:
maxlineno = max(linestarts.values()) + line_offset
if maxlineno >= 1000:

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@ -166,6 +166,20 @@ dis_bug1333982 = """\
bug1333982.__code__.co_firstlineno + 2,
bug1333982.__code__.co_firstlineno + 1)
def bug42562():
pass
# Set line number for 'pass' to None
bug42562.__code__ = bug42562.__code__.replace(co_linetable=b'\x04\x80\xff\x80')
dis_bug42562 = """\
0 LOAD_CONST 0 (None)
2 RETURN_VALUE
"""
_BIG_LINENO_FORMAT = """\
%3d 0 LOAD_GLOBAL 0 (spam)
2 POP_TOP
@ -520,6 +534,9 @@ class DisTests(unittest.TestCase):
self.do_disassembly_test(bug1333982, dis_bug1333982)
def test_bug_42562(self):
self.do_disassembly_test(bug42562, dis_bug42562)
def test_big_linenos(self):
def func(count):
namespace = {}

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@ -0,0 +1,2 @@
Fix issue when dis failed to parse function that has no line numbers. Patch
provided by Yurii Karabas.