File python3-imp-returntype.patch of Package python39

From 7bd6f0e5500f778e940374237b94651f60ae1990 Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Fri, 6 Jul 2018 21:00:45 -0700
Subject: [PATCH] closes bpo-34056: Always return bytes from
 _HackedGetData.get_data(). (GH-8130)

* Always return bytes from _HackedGetData.get_data().

Ensure the imp.load_source shim always returns bytes by reopening the file in
binary mode if needed. Hash-based pycs have to receive the source code in bytes.

It's tempting to change imp.get_suffixes() to always return 'rb' as a mode, but
that breaks some stdlib tests and likely 3rdparty code, too.
(cherry picked from commit b0274f2cddd36b49fe5080efbe160277ef546471)

Co-authored-by: Benjamin Peterson <benjamin@python.org>
---
 Lib/imp.py                                        | 13 ++++++-------
 Lib/test/test_imp.py                              | 15 +++++++++++++++
 .../2018-07-05-22-45-46.bpo-34056.86isrU.rst      |  3 +++
 3 files changed, 24 insertions(+), 7 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Library/2018-07-05-22-45-46.bpo-34056.86isrU.rst

--- a/Lib/test/test_imp.py
+++ b/Lib/test/test_imp.py
@@ -376,6 +376,20 @@ class ImportTests(unittest.TestCase):
             mod = imp.load_module('mymod', file, path, description)
         self.assertEqual(mod.x, 42)
 
+    def test_find_and_load_checked_pyc(self):
+        # issue 34056
+        with support.temp_cwd():
+            with open('mymod.py', 'wb') as fp:
+                fp.write(b'x = 42\n')
+            py_compile.compile(
+                'mymod.py',
+                doraise=True,
+                invalidation_mode=py_compile.PycInvalidationMode.CHECKED_HASH,
+            )
+            file, path, description = imp.find_module('mymod', path=['.'])
+            mod = imp.load_module('mymod', file, path, description)
+        self.assertEqual(mod.x, 42)
+
 
 class ReloadTests(unittest.TestCase):
 
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2018-07-05-22-45-46.bpo-34056.86isrU.rst
@@ -0,0 +1,3 @@
+Ensure the loader shim created by ``imp.load_module`` always returns bytes
+from its ``get_data()`` function. This fixes using ``imp.load_module`` with
+:pep:`552` hash-based pycs.