Fix #1679: "0x" was taken as a valid integer literal.

Fixes the tokenizer, tokenize.py and int() to reject this.
Patches by Malte Helmert.

1 files changed, 7 insertions, 0 deletions

diff --git a/Parser/tokenizer.c b/Parser/tokenizer.c
index 0015dae..0aaec19 100644
--- a/Parser/tokenizer.c
+++ b/Parser/tokenizer.c
@@ -1332,7 +1332,14 @@ tok_get(register struct tok_state *tok, char **p_start, char **p_end)
 				goto imaginary;
 #endif
 			if (c == 'x' || c == 'X') {
+
 				/* Hex */
+				c = tok_nextc(tok);
+				if (!isxdigit(c)) {
+					tok->done = E_TOKEN;
+					tok_backup(tok, c);
+					return ERRORTOKEN;
+				}
 				do {
 					c = tok_nextc(tok);
 				} while (isxdigit(c));