On ResourceWarning, log traceback where the object was allocated
Issue #26567:
* Add a new function PyErr_ResourceWarning() function to pass the destroyed
object
* Add a source attribute to warnings.WarningMessage
* Add warnings._showwarnmsg() which uses tracemalloc to get the traceback where
source object was allocated.
diff --git a/Modules/_io/fileio.c b/Modules/_io/fileio.c
index 8bf3922..a02a9c1 100644
--- a/Modules/_io/fileio.c
+++ b/Modules/_io/fileio.c
@@ -92,8 +92,7 @@
if (self->fd >= 0 && self->closefd) {
PyObject *exc, *val, *tb;
PyErr_Fetch(&exc, &val, &tb);
- if (PyErr_WarnFormat(PyExc_ResourceWarning, 1,
- "unclosed file %R", source)) {
+ if (PyErr_ResourceWarning(source, 1, "unclosed file %R", source)) {
/* Spurious errors can appear at shutdown */
if (PyErr_ExceptionMatches(PyExc_Warning))
PyErr_WriteUnraisable((PyObject *) self);