commit 5daf70b22e72ea1a88c05975f69120b8c4e4927f
author Erlend Egeberg Aasland <erlend.aasland@innova.no> Thu Apr 29 08:47:11 2021 +0200
committer GitHub <noreply@github.com> Thu Apr 29 08:47:11 2021 +0200
tree e9e661b7d671bb41f9ec9776f7d378288d187cf4
parent 1e7b858575d0ad782939f86aae4a2fa1c29e9f14

bpo-43908: Make re types immutable (GH-25697)

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

Modules/_sre.c

diff --git a/Modules/_sre.c b/Modules/_sre.c
index d4bfff6..59f7551 100644
--- a/Modules/_sre.c
+++ b/Modules/_sre.c
@@ -2690,7 +2690,7 @@ static PyType_Spec pattern_spec = {
     .name = "re.Pattern",
     .basicsize = sizeof(PatternObject),
     .itemsize = sizeof(SRE_CODE),
-    .flags = Py_TPFLAGS_DEFAULT,
+    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_IMMUTABLETYPE,
     .slots = pattern_slots,
 };
 
@@ -2755,7 +2755,7 @@ static PyType_Spec match_spec = {
     .name = "re.Match",
     .basicsize = sizeof(MatchObject),
     .itemsize = sizeof(Py_ssize_t),
-    .flags = Py_TPFLAGS_DEFAULT,
+    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_IMMUTABLETYPE,
     .slots = match_slots,
 };
 
@@ -2781,7 +2781,7 @@ static PyType_Slot scanner_slots[] = {
 static PyType_Spec scanner_spec = {
     .name = "_" SRE_MODULE ".SRE_Scanner",
     .basicsize = sizeof(ScannerObject),
-    .flags = Py_TPFLAGS_DEFAULT,
+    .flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_IMMUTABLETYPE,
     .slots = scanner_slots,
 };