gh-151510: Fix __lazy_import__ without frame

Misc/NEWS.d/next/Core_and_Builtins/2026-06-16-00-45-42.gh-issue-151510.HJ-kGn.rst

@@ -0,0 +1,2 @@
+Fix a crash in :func:`!__lazy_import__` when called without an explicit
+``globals`` argument and without a current Python frame.

Python/bltinmodule.c

@@ -313,6 +313,12 @@ builtin___lazy_import___impl(PyObject *module, PyObject *name,
     PyThreadState *tstate = PyThreadState_GET();
     if (globals == NULL) {
         globals = PyEval_GetGlobals();
+        if (globals == NULL) {
+            PyErr_SetString(PyExc_TypeError,
+                            "__lazy_import__() missing globals "
+                            "when called without a frame");
+            return NULL;
+        }
     }
     if (locals == NULL) {
         locals = globals;