[Python-checkins] bpo-33363: raise SyntaxError for async for/with outside async functions (#6616)
Yury Selivanov
webhook-mailer at python.org
Fri Apr 27 11:59:00 EDT 2018
https://github.com/python/cpython/commit/e2396506606115e785c94ec129eb86e2ed0aa744
commit: e2396506606115e785c94ec129eb86e2ed0aa744
branch: master
author: Zsolt Dollenstein <zsol.zsol at gmail.com>
committer: Yury Selivanov <yury at magic.io>
date: 2018-04-27T11:58:56-04:00
summary:
bpo-33363: raise SyntaxError for async for/with outside async functions (#6616)
files:
A Misc/NEWS.d/next/Core and Builtins/2018-04-26-22-48-28.bpo-33363.8RCnN2.rst
M Lib/test/test_coroutines.py
M Python/compile.c
diff --git a/Lib/test/test_coroutines.py b/Lib/test/test_coroutines.py
index 10f7cca50473..47753e2ef03f 100644
--- a/Lib/test/test_coroutines.py
+++ b/Lib/test/test_coroutines.py
@@ -362,7 +362,22 @@ def bar():
"""def foo():
async def bar():
pass\nawait a
- """]
+ """,
+ """def foo():
+ async for i in arange(2):
+ pass
+ """,
+ """def foo():
+ async with resource:
+ pass
+ """,
+ """async with resource:
+ pass
+ """,
+ """async for i in arange(2):
+ pass
+ """,
+ ]
for code in samples:
with self.subTest(code=code), self.assertRaises(SyntaxError):
diff --git a/Misc/NEWS.d/next/Core and Builtins/2018-04-26-22-48-28.bpo-33363.8RCnN2.rst b/Misc/NEWS.d/next/Core and Builtins/2018-04-26-22-48-28.bpo-33363.8RCnN2.rst
new file mode 100644
index 000000000000..ad8d24895343
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2018-04-26-22-48-28.bpo-33363.8RCnN2.rst
@@ -0,0 +1,2 @@
+Raise a SyntaxError for ``async with`` and ``async for`` statements outside
+of async functions.
diff --git a/Python/compile.c b/Python/compile.c
index cc0988f68e25..7960f09319e7 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -2447,6 +2447,10 @@ static int
compiler_async_for(struct compiler *c, stmt_ty s)
{
basicblock *start, *except, *end;
+ if (c->u->u_scope_type != COMPILER_SCOPE_ASYNC_FUNCTION) {
+ return compiler_error(c, "'async for' outside async function");
+ }
+
start = compiler_new_block(c);
except = compiler_new_block(c);
end = compiler_new_block(c);
@@ -4262,6 +4266,9 @@ compiler_async_with(struct compiler *c, stmt_ty s, int pos)
withitem_ty item = asdl_seq_GET(s->v.AsyncWith.items, pos);
assert(s->kind == AsyncWith_kind);
+ if (c->u->u_scope_type != COMPILER_SCOPE_ASYNC_FUNCTION) {
+ return compiler_error(c, "'async with' outside async function");
+ }
block = compiler_new_block(c);
finally = compiler_new_block(c);
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