error check, add tp_traverse to flagsobject

Author: mattip

numpy/core/src/multiarray/flagsobject.c

@@ -900,6 +900,15 @@ arrayflags_new_impl(HPyContext *ctx, HPy self, const HPy *args, HPy_ssize_t narg
     return HPyArray_NewFlagsObject(ctx, self, arg);
 }
 
+HPyDef_SLOT(arrayflags_traverse, HPy_tp_traverse)
+static int
+arrayflags_traverse_impl(void *self, HPyFunc_visitproc visit, void *arg)
+{
+    PyArrayFlagsObject *flags = (PyArrayFlagsObject *)self;
+    HPy_VISIT(&flags->arr);
+    return 0;
+}
+
 /*
 static PyType_Slot arrayflags_slots[] = {
         //{Py_tp_str, arrayflags_print},
@@ -929,6 +938,7 @@ static HPyDef *arrayflags_defines[] = {
         &arrayflags_carray,
         &arrayflags_farray,
         &arrayflags_num,
+        &arrayflags_traverse,
         NULL
 };
 

numpy/core/src/multiarray/scalarapi.c

@@ -559,6 +559,12 @@ HPyArray_FromScalar(HPyContext *ctx, HPy h_scalar, /*PyArray_Descr*/ HPy h_outco
     }
     else {
         char *memptr = hpy_scalar_value(ctx, h_scalar, typecode);
+        if (memptr == NULL)
+        {
+            HPy_Close(ctx, h_r);
+            HPy_Close(ctx, h_typecode);
+            return HPy_NULL;
+        }
 
         memcpy(PyArray_DATA(r), memptr, typecode->elsize);
         if (PyDataType_FLAGCHK(typecode, NPY_ITEM_HASOBJECT)) {