commit 7a69cf47a9bbc95f95fd67c982bff121b2a903cb
author Alexey Izbyshev <izbyshev@ispras.ru> Fri Nov 09 10:12:06 2018 +0300
committer Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Thu Nov 08 23:12:06 2018 -0800
tree 419c9be853df32f31ae559abc448ebde4bc3ba11
parent 0f221d09cad46bee38d1b7a7822772df66c53028

bpo-35194: Fix a wrong constant in cp932 codec (GH-10420)



This typo doesn't affect the result because wrong bits are discarded
on implicit conversion to unsigned char, but it trips UBSan
with -fsanitize=implicit-integer-truncation.





https://bugs.python.org/issue35194

Modules/cjkcodecs/_codecs_jp.c

diff --git a/Modules/cjkcodecs/_codecs_jp.c b/Modules/cjkcodecs/_codecs_jp.c
index 2c7788a..3a33295 100644
--- a/Modules/cjkcodecs/_codecs_jp.c
+++ b/Modules/cjkcodecs/_codecs_jp.c
@@ -40,7 +40,7 @@
             if (c == 0xf8f0)
                 OUTBYTE1(0xa0);
             else
-                OUTBYTE1(c - 0xfef1 + 0xfd);
+                OUTBYTE1(c - 0xf8f1 + 0xfd);
             NEXT(1, 1);
             continue;
         }