[3.12] gh-120155: Fix copy/paste error in HAVE_SUBOFFSETS_IN_LAST_DIM() (GH-120228...

gh-120155: Fix copy/paste error in HAVE_SUBOFFSETS_IN_LAST_DIM() (GH-120228)

Don't hardcode 'dest' in HAVE_SUBOFFSETS_IN_LAST_DIM() macro of
memoryobject.c, but use its 'view' parameter instead.

Fix the Coverity issue:

Error: COPY_PASTE_ERROR (CWE-398):
Python-3.12.2/Objects/memoryobject.c:273:14: original: ""dest->suboffsets + (dest->ndim - 1)"" looks like the original copy.
Python-3.12.2/Objects/memoryobject.c:274:14: copy_paste_error: ""dest"" in ""src->suboffsets + (dest->ndim - 1)"" looks like a copy-paste error.
Python-3.12.2/Objects/memoryobject.c:274:14: remediation: Should it say ""src"" instead?
GH-  272|       assert(dest->ndim > 0 && src->ndim > 0);
GH-  273|       return (!HAVE_SUBOFFSETS_IN_LAST_DIM(dest) &&
GH-  274|->             !HAVE_SUBOFFSETS_IN_LAST_DIM(src) &&
GH-  275|               dest->strides[dest->ndim-1] == dest->itemsize &&
GH-  276|               src->strides[src->ndim-1] == src->itemsize);
(cherry picked from commit 90b75405260467814c93738a3325645918d4ea51)

Co-authored-by: Victor Stinner <vstinner@python.org>

diff --git a/Objects/memoryobject.c b/Objects/memoryobject.c
index b0168044d9f85a707b79f2f329f43b3e23574cc8..3c88859acc1706ac911254d3a36d8612a436025a 100644 (file)
--- a/Objects/memoryobject.c
+++ b/Objects/memoryobject.c
@@ -264,7 +264,7 @@ PyTypeObject _PyManagedBuffer_Type = {
 /* Assumptions: ndim >= 1. The macro tests for a corner case that should
    perhaps be explicitly forbidden in the PEP. */
 #define HAVE_SUBOFFSETS_IN_LAST_DIM(view) \
-    (view->suboffsets && view->suboffsets[dest->ndim-1] >= 0)
+    (view->suboffsets && view->suboffsets[view->ndim-1] >= 0)
 
 static inline int
 last_dim_is_contiguous(const Py_buffer *dest, const Py_buffer *src)