[Python-checkins] bpo-41061: Fix incorrect expressions in hashtable (GH-21028)

[Christian Heimes]

https://github.com/python/cpython/commit/4901ea952691ad70aae21cfe04b6bd363b5a6aff
commit: 4901ea952691ad70aae21cfe04b6bd363b5a6aff
branch: master
author: Christian Heimes <christian at python.org>
committer: GitHub <noreply at github.com>
date: 2020-06-22T00:41:48-07:00
summary:

bpo-41061: Fix incorrect expressions in hashtable (GH-21028)



Signed-off-by: Christian Heimes <christian at python.org>

files:
A Misc/NEWS.d/next/Core and Builtins/2020-06-21-10-54-02.bpo-41061.AHf9MU.rst
M Modules/_testinternalcapi.c
M Python/hashtable.c

diff --git a/Misc/NEWS.d/next/Core and Builtins/2020-06-21-10-54-02.bpo-41061.AHf9MU.rst b/Misc/NEWS.d/next/Core and Builtins/2020-06-21-10-54-02.bpo-41061.AHf9MU.rst
new file mode 100644
index 0000000000000..b5bb81621b7f2
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2020-06-21-10-54-02.bpo-41061.AHf9MU.rst	
@@ -0,0 +1 @@
+Fix incorrect expressions and asserts in hashtable code and tests.
diff --git a/Modules/_testinternalcapi.c b/Modules/_testinternalcapi.c
index 7970e2f4f443f..ad74af8363ef4 100644
--- a/Modules/_testinternalcapi.c
+++ b/Modules/_testinternalcapi.c
@@ -197,8 +197,8 @@ test_hashtable(PyObject *self, PyObject *Py_UNUSED(args))
     for (key='a'; key <= 'z'; key++) {
         _Py_hashtable_entry_t *entry = _Py_hashtable_get_entry(table, TO_PTR(key));
         assert(entry != NULL);
-        assert(entry->key = TO_PTR(key));
-        assert(entry->value = TO_PTR(VALUE(key)));
+        assert(entry->key == TO_PTR(key));
+        assert(entry->value == TO_PTR(VALUE(key)));
     }
 
     // Test _Py_hashtable_get()
diff --git a/Python/hashtable.c b/Python/hashtable.c
index b92e8ca08c7e1..09501de199b0e 100644
--- a/Python/hashtable.c
+++ b/Python/hashtable.c
@@ -133,7 +133,7 @@ _Py_hashtable_get_entry_generic(_Py_hashtable_t *ht, const void *key)
 {
     Py_uhash_t key_hash = ht->hash_func(key);
     size_t index = key_hash & (ht->nbuckets - 1);
-    _Py_hashtable_entry_t *entry = entry = TABLE_HEAD(ht, index);
+    _Py_hashtable_entry_t *entry = TABLE_HEAD(ht, index);
     while (1) {
         if (entry == NULL) {
             return NULL;
@@ -155,7 +155,7 @@ _Py_hashtable_get_entry_ptr(_Py_hashtable_t *ht, const void *key)
 {
     Py_uhash_t key_hash = _Py_hashtable_hash_ptr(key);
     size_t index = key_hash & (ht->nbuckets - 1);
-    _Py_hashtable_entry_t *entry = entry = TABLE_HEAD(ht, index);
+    _Py_hashtable_entry_t *entry = TABLE_HEAD(ht, index);
     while (1) {
         if (entry == NULL) {
             return NULL;