commit 572ef747692055a270a9fbf8eeaf5c4a15c8e332
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Tue Mar 31 05:26:05 2020 -0700
committer GitHub <noreply@github.com> Tue Mar 31 05:26:05 2020 -0700
tree 6d230f98dd589684891301dd58b627135e4f3e0b
parent 6a0ee60db4cee4a01bae1a2922d21a859e9ea2ed

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@bytereef.org>

Modules/_struct.c

diff --git a/Modules/_struct.c b/Modules/_struct.c
index 9281c68..1c917b7 100644
--- a/Modules/_struct.c
+++ b/Modules/_struct.c
@@ -2365,6 +2365,9 @@
                        "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;