diff -r dcbbff7e6b56 Include/errcode.h
--- a/Include/errcode.h	Sat Feb 15 13:01:41 2014 +0200
+++ b/Include/errcode.h	Sat Feb 15 14:13:21 2014 +0200
@@ -31,6 +31,11 @@
 #define E_LINECONT	25	/* Unexpected characters after a line continuation */
 #define E_IDENTIFIER    26      /* Invalid characters in identifier */
 #define E_BADSINGLE	27	/* Ill-formed single statement input */
+#define E_BADHEX	28	/* Bad digit in hex literal */
+#define E_BADOCTAL	29	/* Bad digit in octal literal */
+#define E_BADBINARY	30	/* Bad digit in binary literal */
+#define E_BADFLOAT	31	/* Bad digit in float literal */
+#define E_OLDOCTAL	32	/* Old octal syntax is not supported */
 
 #ifdef __cplusplus
 }
diff -r dcbbff7e6b56 Parser/tokenizer.c
--- a/Parser/tokenizer.c	Sat Feb 15 13:01:41 2014 +0200
+++ b/Parser/tokenizer.c	Sat Feb 15 14:13:21 2014 +0200
@@ -1517,7 +1517,7 @@
                 /* Hex */
                 c = tok_nextc(tok);
                 if (!isxdigit(c)) {
-                    tok->done = E_TOKEN;
+                    tok->done = E_BADHEX;
                     tok_backup(tok, c);
                     return ERRORTOKEN;
                 }
@@ -1529,7 +1529,7 @@
                 /* Octal */
                 c = tok_nextc(tok);
                 if (c < '0' || c >= '8') {
-                    tok->done = E_TOKEN;
+                    tok->done = E_BADOCTAL;
                     tok_backup(tok, c);
                     return ERRORTOKEN;
                 }
@@ -1541,7 +1541,7 @@
                 /* Binary */
                 c = tok_nextc(tok);
                 if (c != '0' && c != '1') {
-                    tok->done = E_TOKEN;
+                    tok->done = E_BADBINARY;
                     tok_backup(tok, c);
                     return ERRORTOKEN;
                 }
@@ -1566,7 +1566,7 @@
                 else if (c == 'j' || c == 'J')
                     goto imaginary;
                 else if (nonzero) {
-                    tok->done = E_TOKEN;
+                    tok->done = E_OLDOCTAL;
                     tok_backup(tok, c);
                     return ERRORTOKEN;
                 }
@@ -1593,7 +1593,7 @@
                     if (c == '+' || c == '-')
                         c = tok_nextc(tok);
                     if (!isdigit(c)) {
-                        tok->done = E_TOKEN;
+                        tok->done = E_BADFLOAT;
                         tok_backup(tok, c);
                         return ERRORTOKEN;
                     }
diff -r dcbbff7e6b56 Python/pythonrun.c
--- a/Python/pythonrun.c	Sat Feb 15 13:01:41 2014 +0200
+++ b/Python/pythonrun.c	Sat Feb 15 14:13:21 2014 +0200
@@ -2539,6 +2539,21 @@
     case E_BADSINGLE:
         msg = "multiple statements found while compiling a single statement";
         break;
+    case E_BADHEX:
+        msg = "bad digit in hex literal";
+        break;
+    case E_BADOCTAL:
+        msg = "bad digit in octal literal";
+        break;
+    case E_BADBINARY:
+        msg = "bad digit in binary literal";
+        break;
+    case E_BADFLOAT:
+        msg = "bad digit in float literal";
+        break;
+    case E_OLDOCTAL:
+        msg = "decimal numbers may not have a lleading zero";
+        break;
     default:
         fprintf(stderr, "error=%d\n", err->error);
         msg = "unknown parsing error";