[Python-checkins] bpo-39689: Do not use native packing for format "?" with standard size (GH-18969)

[Miss Islington (bot)]

https://github.com/python/cpython/commit/572ef747692055a270a9fbf8eeaf5c4a15c8e332
commit: 572ef747692055a270a9fbf8eeaf5c4a15c8e332
branch: 3.8
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: GitHub <noreply at github.com>
date: 2020-03-31T05:26:05-07:00
summary:

bpo-39689: Do not use native packing for format "?" with standard size (GH-18969)

(cherry picked from commit 472fc843ca816d65c12f9508ac762ca492165c45)

Co-authored-by: Stefan Krah <skrah at bytereef.org>

files:
M Modules/_struct.c

diff --git a/Modules/_struct.c b/Modules/_struct.c
index 9281c6803f3a6..1c917b7513f46 100644
--- a/Modules/_struct.c
+++ b/Modules/_struct.c
@@ -2365,6 +2365,9 @@ PyInit__struct(void)
                        "unknown" float format */
                     if (ptr->format == 'd' || ptr->format == 'f')
                         break;
+                    /* Skip _Bool, semantics are different for standard size */
+                    if (ptr->format == '?')
+                        break;
                     ptr->pack = native->pack;
                     ptr->unpack = native->unpack;
                     break;