From c4b813d05dbf8b1bc1ab3c27198b397152deb4a3 Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Mon, 8 Feb 2016 01:06:11 +0200
Subject: Issue #26198: Fixed error messages for some argument parsing errors.
 Fixed the documented about buffer overflow error for "es#" and "et#" format
 units.

---
 Python/getargs.c | 32 ++++++++++++++++++++------------
 1 file changed, 20 insertions(+), 12 deletions(-)

(limited to 'Python/getargs.c')

diff --git a/Python/getargs.c b/Python/getargs.c
index c365fc25a3..8aab067865 100644
--- a/Python/getargs.c
+++ b/Python/getargs.c
@@ -342,7 +342,7 @@ vgetargs1(PyObject *args, const char *format, va_list *p_va, int flags)
                           flags, levels, msgbuf,
                           sizeof(msgbuf), &freelist);
         if (msg) {
-            seterror(i+1, msg, levels, fname, msg);
+            seterror(i+1, msg, levels, fname, message);
             return cleanreturn(0, &freelist);
         }
     }
@@ -535,9 +535,15 @@ converterr(const char *expected, PyObject *arg, char *msgbuf, size_t bufsize)
 {
     assert(expected != NULL);
     assert(arg != NULL);
-    PyOS_snprintf(msgbuf, bufsize,
-                  "must be %.50s, not %.50s", expected,
-                  arg == Py_None ? "None" : arg->ob_type->tp_name);
+    if (expected[0] == '(') {
+        PyOS_snprintf(msgbuf, bufsize,
+                      "%.100s", expected);
+    }
+    else {
+        PyOS_snprintf(msgbuf, bufsize,
+                      "must be %.50s, not %.50s", expected,
+                      arg == Py_None ? "None" : arg->ob_type->tp_name);
+    }
     return msgbuf;
 }
 
@@ -741,7 +747,7 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
         if (PyLong_Check(arg))
             ival = PyLong_AsUnsignedLongMask(arg);
         else
-            return converterr("integer<k>", arg, msgbuf, bufsize);
+            return converterr("int", arg, msgbuf, bufsize);
         *p = ival;
         break;
     }
@@ -766,7 +772,7 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
         if (PyLong_Check(arg))
             ival = PyLong_AsUnsignedLongLongMask(arg);
         else
-            return converterr("integer<K>", arg, msgbuf, bufsize);
+            return converterr("int", arg, msgbuf, bufsize);
         *p = ival;
         break;
     }
@@ -1123,9 +1129,11 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
             } else {
                 if (size + 1 > BUFFER_LEN) {
                     Py_DECREF(s);
-                    return converterr(
-                        "(buffer overflow)",
-                        arg, msgbuf, bufsize);
+                    PyErr_Format(PyExc_TypeError,
+                                 "encoded string too long "
+                                 "(%zd, maximum length %zd)",
+                                 (Py_ssize_t)size, (Py_ssize_t)(BUFFER_LEN-1));
+                    RETURN_ERR_OCCURRED;
                 }
             }
             memcpy(*buffer, ptr, size+1);
@@ -1147,7 +1155,7 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
             if ((Py_ssize_t)strlen(ptr) != size) {
                 Py_DECREF(s);
                 return converterr(
-                    "encoded string without NULL bytes",
+                    "encoded string without null bytes",
                     arg, msgbuf, bufsize);
             }
             *buffer = PyMem_NEW(char, size + 1);
@@ -1237,7 +1245,7 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
 
         if (*format != '*')
             return converterr(
-                "invalid use of 'w' format character",
+                "(invalid use of 'w' format character)",
                 arg, msgbuf, bufsize);
         format++;
 
@@ -1261,7 +1269,7 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
     }
 
     default:
-        return converterr("impossible<bad format char>", arg, msgbuf, bufsize);
+        return converterr("(impossible<bad format char>)", arg, msgbuf, bufsize);
 
     }
 
-- 
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