diff --git a/Misc/NEWS b/Misc/NEWS
@@ -10,6 +10,8 @@ What's New in Python 3.7.0 alpha 1?
Core and Builtins
-----------------

- bpo-28856: Fix an oversight that %b format for bytes should support objects
  follow the buffer protocol.


diff --git a/Python/ceval.c b/Python/ceval.c
@@ -5024,7 +5024,7 @@ import_from(PyObject *v, PyObject *name)
{
    PyObject *x;
    _Py_IDENTIFIER(__name__);
-    PyObject *fullmodname, *pkgname, *pkgpath, *pkgname_or_unknown;

    x = PyObject_GetAttr(v, name);
    if (x != NULL || !PyErr_ExceptionMatches(PyExc_AttributeError))
@@ -5039,6 +5039,7 @@ import_from(PyObject *v, PyObject *name)
    }
    fullmodname = PyUnicode_FromFormat("%U.%U", pkgname, name);
    if (fullmodname == NULL) {
        return NULL;
    }
    x = PyDict_GetItem(PyImport_GetModuleDict(), fullmodname);
@@ -5063,17 +5064,23 @@ import_from(PyObject *v, PyObject *name)

    if (pkgpath == NULL || !PyUnicode_Check(pkgpath)) {
        PyErr_Clear();
-        PyErr_SetImportError(
-            PyUnicode_FromFormat("cannot import name %R from %R (unknown location)",
-                name, pkgname_or_unknown),
-            pkgname, NULL);
-    } else {
-        PyErr_SetImportError(
-            PyUnicode_FromFormat("cannot import name %R from %R (%S)",
-                name, pkgname_or_unknown, pkgpath),
-            pkgname, pkgpath);
    }

    Py_XDECREF(pkgname_or_unknown);
    Py_XDECREF(pkgpath);
    return NULL;