Ensure TypeError use raise_from for C++->Python overload res. (#3671)

ce18721d · Aaron Gokaslan · GitHub · 978617f6 · ce18721d
Commit ce18721d authored Jan 31, 2022 by Aaron Gokaslan Committed by GitHub Jan 31, 2022
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include/pybind11/pybind11.h
+7 -0

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--- a/include/pybind11/pybind11.h
+++ b/include/pybind11/pybind11.h
@@ -988,6 +988,13 @@ protected:
            }

            append_note_if_missing_header_is_suspected(msg);
+#if PY_VERSION_HEX >= 0x03030000
+            // Attach additional error info to the exception if supported
+            if (PyErr_Occurred()) {
+                raise_from(PyExc_TypeError, msg.c_str());
+                return nullptr;
+            }
+#endif
            PyErr_SetString(PyExc_TypeError, msg.c_str());
            return nullptr;
        }