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
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@ -384,7 +384,7 @@ def _disassemble_bytes(code, lasti=-1, varnames=None, names=None,
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constants=None, cells=None, linestarts=None,
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*, file=None, line_offset=0):
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# Omit the line number column entirely if we have no line number info
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show_lineno = linestarts is not None
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show_lineno = bool(linestarts)
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if show_lineno:
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maxlineno = max(linestarts.values()) + line_offset
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if maxlineno >= 1000:
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@ -166,6 +166,20 @@ dis_bug1333982 = """\
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bug1333982.__code__.co_firstlineno + 2,
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bug1333982.__code__.co_firstlineno + 1)
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def bug42562():
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pass
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# Set line number for 'pass' to None
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bug42562.__code__ = bug42562.__code__.replace(co_linetable=b'\x04\x80\xff\x80')
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dis_bug42562 = """\
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0 LOAD_CONST 0 (None)
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2 RETURN_VALUE
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"""
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_BIG_LINENO_FORMAT = """\
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%3d 0 LOAD_GLOBAL 0 (spam)
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2 POP_TOP
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@ -520,6 +534,9 @@ class DisTests(unittest.TestCase):
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self.do_disassembly_test(bug1333982, dis_bug1333982)
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def test_bug_42562(self):
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self.do_disassembly_test(bug42562, dis_bug42562)
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def test_big_linenos(self):
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def func(count):
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namespace = {}
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@ -0,0 +1,2 @@
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Fix issue when dis failed to parse function that has no line numbers. Patch
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provided by Yurii Karabas.
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