gh-148967: Fix FFI type pointer handling for C complex support in set_stginfo_ffi_type_pointer (GH-148969)

sunmy2019 · miss-islington · commit ac44e3e37fbe · 2026-05-01T12:12:16.000Z
(cherry picked from commit f2c7c0d) Co-authored-by: sunmy2019 <59365878+sunmy2019@users.noreply.github.com>
diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c
@@ -2235,6 +2235,7 @@ c_void_p_from_param_impl(PyObject *type, PyTypeObject *cls, PyObject *value)
 static int
 set_stginfo_ffi_type_pointer(StgInfo *stginfo, struct fielddesc *fmt)
 {
+#if defined(_Py_FFI_SUPPORT_C_COMPLEX)
     if (!fmt->pffi_type->elements) {
         stginfo->ffi_type_pointer = *fmt->pffi_type;
     }
@@ -2254,6 +2255,10 @@ set_stginfo_ffi_type_pointer(StgInfo *stginfo, struct fielddesc *fmt)
         memcpy(stginfo->ffi_type_pointer.elements,
                fmt->pffi_type->elements, els_size);
     }
+#else
+    assert(!fmt->pffi_type->elements);
+    stginfo->ffi_type_pointer = *fmt->pffi_type;
+#endif
     return 0;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -2235,6 +2235,7 @@ c_void_p_from_param_impl(PyObject type, PyTypeObject cls, PyObject *value)`
`2235`	`2235`	`static int`
`2236`	`2236`	`set_stginfo_ffi_type_pointer(StgInfo stginfo, struct fielddesc fmt)`
`2237`	`2237`	`{`
	`2238`	`+#if defined(_Py_FFI_SUPPORT_C_COMPLEX)`
`2238`	`2239`	`if (!fmt->pffi_type->elements) {`
`2239`	`2240`	`stginfo->ffi_type_pointer = *fmt->pffi_type;`
`2240`	`2241`	`}`
`@@ -2254,6 +2255,10 @@ set_stginfo_ffi_type_pointer(StgInfo stginfo, struct fielddesc fmt)`
`2254`	`2255`	`memcpy(stginfo->ffi_type_pointer.elements,`
`2255`	`2256`	`fmt->pffi_type->elements, els_size);`
`2256`	`2257`	`}`
	`2258`	`+#else`
	`2259`	`+ assert(!fmt->pffi_type->elements);`
	`2260`	`+ stginfo->ffi_type_pointer = *fmt->pffi_type;`
	`2261`	`+#endif`
`2257`	`2262`	`return 0;`
`2258`	`2263`	`}`
`2259`	`2264`