Remove dead stores to 'size' in UTF-8 decoder (unicodeobject.c) (#140637)

ashm-dev · web-flow · commit 7d70a147f58e · 2025-10-27T11:55:57.000+03:00
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
@@ -5409,7 +5409,6 @@ unicode_decode_utf8(const char *s, Py_ssize_t size,
     if (maxchr <= 255) {
         memcpy(PyUnicode_1BYTE_DATA(u), s, pos);
         s += pos;
-        size -= pos;
         writer.pos = pos;
     }
 
@@ -5457,7 +5456,6 @@ unicode_decode_utf8_writer(_PyUnicodeWriter *writer,
             return 0;
         }
         s += decoded;
-        size -= decoded;
     }
 
     return unicode_decode_utf8_impl(writer, starts, s, end,

Original file line number	Diff line number	Diff line change
`@@ -5409,7 +5409,6 @@ unicode_decode_utf8(const char *s, Py_ssize_t size,`
`5409`	`5409`	`if (maxchr <= 255) {`
`5410`	`5410`	`memcpy(PyUnicode_1BYTE_DATA(u), s, pos);`
`5411`	`5411`	`s += pos;`
`5412`		`- size -= pos;`
`5413`	`5412`	`writer.pos = pos;`
`5414`	`5413`	`}`
`5415`	`5414`
`@@ -5457,7 +5456,6 @@ unicode_decode_utf8_writer(_PyUnicodeWriter *writer,`
`5457`	`5456`	`return 0;`
`5458`	`5457`	`}`
`5459`	`5458`	`s += decoded;`
`5460`		`- size -= decoded;`
`5461`	`5459`	`}`
`5462`	`5460`
`5463`	`5461`	`return unicode_decode_utf8_impl(writer, starts, s, end,`