diff --git a/InternalDocs/README.md b/InternalDocs/README.md
index 06f67b3cfc124a..80744f30a5b591 100644
--- a/InternalDocs/README.md
+++ b/InternalDocs/README.md
@@ -29,8 +29,6 @@ Runtime Objects
 
 - [Frames](frames.md)
 
-- [String Interning](string_interning.md)
-
 Program Execution
 ---
 
@@ -48,6 +46,14 @@ Program Execution
 
 - [Stack protection](stack_protection.md)
 
+Built-in Types
+---
+
+- [String Interning](string_interning.md)
+
+- [List sort algorithm](../Objects/listsort.txt)
+  <!-- (kept at the original location outside this directory) -->
+
 Modules
 ---
 
diff --git a/Misc/NEWS.d/next/Library/2025-12-12-02-56-26.gh-issue-142595.wHvTqq.rst b/Misc/NEWS.d/next/Library/2025-12-12-02-56-26.gh-issue-142595.wHvTqq.rst
new file mode 100644
index 00000000000000..987e1ae8354b18
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-12-12-02-56-26.gh-issue-142595.wHvTqq.rst
@@ -0,0 +1,2 @@
+Added type check during initialization of the :mod:`decimal` module to
+prevent a crash in case of broken stdlib.  Patch by Sergey B Kirpichev.
diff --git a/Modules/_decimal/_decimal.c b/Modules/_decimal/_decimal.c
index 0484d9896a1c17..6ed8c0f3beb277 100644
--- a/Modules/_decimal/_decimal.c
+++ b/Modules/_decimal/_decimal.c
@@ -7753,10 +7753,14 @@ _decimal_exec(PyObject *m)
 
     /* DecimalTuple */
     ASSIGN_PTR(collections, PyImport_ImportModule("collections"));
-    ASSIGN_PTR(state->DecimalTuple, (PyTypeObject *)PyObject_CallMethod(collections,
-                                 "namedtuple", "(ss)", "DecimalTuple",
-                                 "sign digits exponent"));
-
+    obj = PyObject_CallMethod(collections, "namedtuple", "(ss)", "DecimalTuple",
+                              "sign digits exponent");
+    if (!PyType_Check(obj)) {
+        PyErr_SetString(PyExc_TypeError,
+                        "type is expected from namedtuple call");
+        goto error;
+    }
+    ASSIGN_PTR(state->DecimalTuple, (PyTypeObject *)obj);
     ASSIGN_PTR(obj, PyUnicode_FromString("decimal"));
     CHECK_INT(PyDict_SetItemString(state->DecimalTuple->tp_dict, "__module__", obj));
     Py_CLEAR(obj);
diff --git a/Python/crossinterp.c b/Python/crossinterp.c
index 542253c14de9b8..b43f33fdf97771 100644
--- a/Python/crossinterp.c
+++ b/Python/crossinterp.c
@@ -3185,7 +3185,7 @@ _PyXI_InitTypes(PyInterpreterState *interp)
                 "failed to initialize the cross-interpreter exception types");
     }
     // We would initialize heap types here too but that leads to ref leaks.
-    // Instead, we intialize them in _PyXI_Init().
+    // Instead, we initialize them in _PyXI_Init().
     return _PyStatus_OK();
 }
 
diff --git a/Python/qsbr.c b/Python/qsbr.c
index b2153bf9d67230..6bf5b75f346690 100644
--- a/Python/qsbr.c
+++ b/Python/qsbr.c
@@ -57,7 +57,7 @@ qsbr_allocate(struct _qsbr_shared *shared)
     return qsbr;
 }
 
-// Initialize (or reintialize) the freelist of QSBR thread states
+// Initialize (or reinitialize) the freelist of QSBR thread states
 static void
 initialize_new_array(struct _qsbr_shared *shared)
 {