[issue2630] repr() should not escape non-ASCII characters

Python/pythonrun.c

 
 /* Python interpreter top-level routines, including init/exit */
 
 #include "Python.h"
 
 #include "Python-ast.h"
 #undef Yield /* undefine macro conflicting with winbase.h */
 #include "grammar.h"
 #include "node.h"
 #include "token.h"
@@ skipping 746 matching lines @@
         fd = fileno(stdout);
         if (fd < 0) {
 #ifdef MS_WINDOWS
                 std = Py_None;
                 Py_INCREF(std);
 #else
                 goto error;
 #endif
         }
         else {
-                if (!(std = PyFile_FromFd(fd, "<stdout>", "w", -1, NULL, NULL,
-                                          "\n", 0))) {
+                if (!(std = PyFile_FromFd(fd, "<stdout>", "w", -1, NULL,
+                                          "backslashreplace", "\n", 0))) {
                         goto error;
                 }
         } /* if (fd < 0) */
         PySys_SetObject("__stdout__", std);
         PySys_SetObject("stdout", std);
         Py_DECREF(std);
 
 #if 1 /* Disable this if you have trouble debugging bootstrap stuff */
         /* Set sys.stderr, replaces the preliminary stderr */
         fd = fileno(stderr);
         if (fd < 0) {
 #ifdef MS_WINDOWS
                 std = Py_None;
                 Py_INCREF(std);
 #else
                 goto error;
 #endif
         }
         else {
-                if (!(std = PyFile_FromFd(fd, "<stderr>", "w", -1, NULL, NULL,
-                                          "\n", 0))) {
+                if (!(std = PyFile_FromFd(fd, "<stderr>", "w", -1, NULL,
+                                          "backslashreplace", "\n", 0))) {
                         goto error;
                 }
         } /* if (fd < 0) */
 
         /* Same as hack above, pre-import stderr's codec to avoid recursion
            when import.c tries to write to stderr in verbose mode. */
         encoding_attr = PyObject_GetAttrString(std, "encoding");
         if (encoding_attr != NULL) {
                 const char * encoding;
                 encoding = PyUnicode_AsString(encoding_attr);
@@ skipping 1279 matching lines @@
 #undef PyRun_InteractiveLoop
 PyAPI_FUNC(int)
 PyRun_InteractiveLoop(FILE *f, const char *p)
 {
         return PyRun_InteractiveLoopFlags(f, p, NULL);
 }
 
 #ifdef __cplusplus
 }
 #endif