bpo-37960: Silence only necessary errors in repr() of buffered and text streams. (GH-15543)

(cherry picked from commit b235a1b47394eedc5f8ea4cf214f56c4c6932e59)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

2 files changed, 16 insertions, 18 deletions

diff --git a/Modules/_io/bufferedio.c b/Modules/_io/bufferedio.c
index 44e12db..8e8ff97 100644
--- a/Modules/_io/bufferedio.c
+++ b/Modules/_io/bufferedio.c
@@ -1378,12 +1378,14 @@ buffered_repr(buffered *self)
 {
     PyObject *nameobj, *res;
 
-    nameobj = _PyObject_GetAttrId((PyObject *) self, &PyId_name);
-    if (nameobj == NULL) {
-        if (PyErr_ExceptionMatches(PyExc_Exception))
-            PyErr_Clear();
-        else
+    if (_PyObject_LookupAttrId((PyObject *) self, &PyId_name, &nameobj) < 0) {
+        if (!PyErr_ExceptionMatches(PyExc_ValueError)) {
             return NULL;
+        }
+        /* Ignore ValueError raised if the underlying stream was detached */
+        PyErr_Clear();
+    }
+    if (nameobj == NULL) {
         res = PyUnicode_FromFormat("<%s>", Py_TYPE(self)->tp_name);
     }
     else {
diff --git a/Modules/_io/textio.c b/Modules/_io/textio.c
index 73b2756..4fe1b29 100644
--- a/Modules/_io/textio.c
+++ b/Modules/_io/textio.c
@@ -2860,14 +2860,14 @@ textiowrapper_repr(textio *self)
         }
         goto error;
     }
-    nameobj = _PyObject_GetAttrId((PyObject *) self, &PyId_name);
-    if (nameobj == NULL) {
-        if (PyErr_ExceptionMatches(PyExc_Exception))
-            PyErr_Clear();
-        else
+    if (_PyObject_LookupAttrId((PyObject *) self, &PyId_name, &nameobj) < 0) {
+        if (!PyErr_ExceptionMatches(PyExc_ValueError)) {
             goto error;
+        }
+        /* Ignore ValueError raised if the underlying stream was detached */
+        PyErr_Clear();
     }
-    else {
+    if (nameobj != NULL) {
         s = PyUnicode_FromFormat(" name=%R", nameobj);
         Py_DECREF(nameobj);
         if (s == NULL)
@@ -2876,14 +2876,10 @@ textiowrapper_repr(textio *self)
         if (res == NULL)
             goto error;
     }
-    modeobj = _PyObject_GetAttrId((PyObject *) self, &PyId_mode);
-    if (modeobj == NULL) {
-        if (PyErr_ExceptionMatches(PyExc_Exception))
-            PyErr_Clear();
-        else
-            goto error;
+    if (_PyObject_LookupAttrId((PyObject *) self, &PyId_mode, &modeobj) < 0) {
+        goto error;
     }
-    else {
+    if (modeobj != NULL) {
         s = PyUnicode_FromFormat(" mode=%R", modeobj);
         Py_DECREF(modeobj);
         if (s == NULL)