1 files changed, 1 insertions, 0 deletions
diff --git a/Modules/_json.c b/Modules/_json.c
index 95c658c..40c2ced 100644
--- a/Modules/_json.c
+++ b/Modules/_json.c
@@ -246,6 +246,7 @@ ascii_escape_unicode(PyObject *pystr)
         }
     }
     output[chars++] = '"';
+    assert(_PyUnicode_CheckConsistency(rval, 1));
     return rval;
 }