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gh-111123: symtable should visit exception handlers before the else block by iritkatriel · Pull Request #111142 · python/cpython · GitHub

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gh-111123: symtable should visit exception handlers before the else block #111142

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Merged
iritkatriel merged 6 commits into from
Oct 21, 2023
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gh-111123: symtable should visit exception handlers before the else block #111142

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gh-111123: symtable should visit exception handlers before the else b…
iritkatriel Oct 20, 2023
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add news
iritkatriel Oct 20, 2023
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typo
iritkatriel Oct 20, 2023
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except* too
iritkatriel Oct 21, 2023
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add what's new
iritkatriel Oct 21, 2023
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typo
iritkatriel Oct 21, 2023
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4 changes: 4 additions & 0 deletions Doc/whatsnew/3.13.rst
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Expand Up @@ -106,6 +106,10 @@ Other Language Changes
the file is not accessible.
(Contributed by Moonsik Park in :gh:`82367`.)

* Fixed a bug where a :keyword:`global` decleration in an :keyword:`except` block

AlexWaygood Oct 21, 2023

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Typo: should be "declaration"
is rejected when the global is used in the :keyword:`else` block.
(Contributed by Irit Katriel in :gh:`111123`.)

New Modules
===========

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17 changes: 17 additions & 0 deletions Lib/test/test_compile.py
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Expand Up @@ -1283,6 +1283,23 @@ def test_remove_redundant_nop_edge_case(self):
def f():
a if (1 if b else c) else d

def test_global_declaration_in_except_used_in_else(self):
# See gh-111123
code = textwrap.dedent("""\
def f():
try:
pass
%s Exception:
global a
else:
print(a)
""")

g, l = {'a': 5}, {}
for kw in ("except", "except*"):
exec(code % kw, g, l);


@requires_debug_ranges()
class TestSourcePositions(unittest.TestCase):
# Ensure that compiled code snippets have correct line and column numbers
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Core and Builtins/2023-10-20-23-14-06.gh-issue-111123.jjVc3M.rst
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@@ -0,0 +1,2 @@
Fix a bug where a :keyword:`global` declaration in an :keyword:`except` block
is rejected when the global is used in the :keyword:`else` block.
4 changes: 2 additions & 2 deletions Python/symtable.c
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Expand Up @@ -1813,14 +1813,14 @@ symtable_visit_stmt(struct symtable *st, stmt_ty s)
break;
case Try_kind:
VISIT_SEQ(st, stmt, s->v.Try.body);
VISIT_SEQ(st, stmt, s->v.Try.orelse);
VISIT_SEQ(st, excepthandler, s->v.Try.handlers);
VISIT_SEQ(st, stmt, s->v.Try.orelse);
VISIT_SEQ(st, stmt, s->v.Try.finalbody);
break;
case TryStar_kind:
VISIT_SEQ(st, stmt, s->v.TryStar.body);
VISIT_SEQ(st, stmt, s->v.TryStar.orelse);
VISIT_SEQ(st, excepthandler, s->v.TryStar.handlers);
VISIT_SEQ(st, stmt, s->v.TryStar.orelse);
VISIT_SEQ(st, stmt, s->v.TryStar.finalbody);
break;
case Assert_kind:
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