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-rw-r--r--Modules/_sre.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/Modules/_sre.c b/Modules/_sre.c
index c1e9fa6e6b..979e61fb53 100644
--- a/Modules/_sre.c
+++ b/Modules/_sre.c
@@ -2683,12 +2683,18 @@ pattern_richcompare(PyObject *lefto, PyObject *righto, int op)
if (Py_TYPE(lefto) != &Pattern_Type || Py_TYPE(righto) != &Pattern_Type) {
Py_RETURN_NOTIMPLEMENTED;
}
+
+ if (lefto == righto) {
+ /* a pattern is equal to itself */
+ return PyBool_FromLong(op == Py_EQ);
+ }
+
left = (PatternObject *)lefto;
right = (PatternObject *)righto;
cmp = (left->flags == right->flags
&& left->isbytes == right->isbytes
- && left->codesize && right->codesize);
+ && left->codesize == right->codesize);
if (cmp) {
/* Compare the code and the pattern because the same pattern can
produce different codes depending on the locale used to compile the