From c8d0f5c9569a8b5d63ef991a075149d920f1f68e Mon Sep 17 00:00:00 2001
From: HyeockJinKim <kherootz@gmail.com>
Date: Sat, 28 Sep 2019 23:49:23 +0900
Subject: [PATCH 1/2] Generate SyntaxError at integer starting with 0

Generate syntaxError at integer starting with 0,
not zero

Fixes #1422
---
 parser/src/lexer.rs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/parser/src/lexer.rs b/parser/src/lexer.rs
index 0f2e28bd2..5d11514dc 100644
--- a/parser/src/lexer.rs
+++ b/parser/src/lexer.rs
@@ -8,6 +8,7 @@ pub use super::token::Tok;
 use crate::error::{LexicalError, LexicalErrorType};
 use crate::location::Location;
 use num_bigint::BigInt;
+use num_traits::identities::Zero;
 use num_traits::Num;
 use std::cmp::Ordering;
 use std::collections::HashMap;
@@ -352,7 +353,7 @@ where
     /// Lex a normal number, that is, no octal, hex or binary number.
     fn lex_normal_number(&mut self) -> LexResult {
         let start_pos = self.get_pos();
-
+        let start_is_zero = self.chr0 == Some('0');
         // Normal number:
         let mut value_text = self.radix_run(10);
 
@@ -403,6 +404,12 @@ where
             } else {
                 let end_pos = self.get_pos();
                 let value = value_text.parse::<BigInt>().unwrap();
+                if start_is_zero && !value.is_zero() {
+                    return Err(LexicalError {
+                        error: LexicalErrorType::OtherError("Invalid Token".to_string()),
+                        location: self.get_pos(),
+                    });
+                }
                 Ok((start_pos, Tok::Int { value }, end_pos))
             }
         }

From 831c883deb582da935b1fb5c3ccab59f1dc87464 Mon Sep 17 00:00:00 2001
From: HyeockJinKim <kherootz@gmail.com>
Date: Sun, 29 Sep 2019 00:07:32 +0900
Subject: [PATCH 2/2] Add tests for integer

---
 tests/snippets/ints.py | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/tests/snippets/ints.py b/tests/snippets/ints.py
index fe3d046f9..86a848f20 100644
--- a/tests/snippets/ints.py
+++ b/tests/snippets/ints.py
@@ -232,3 +232,24 @@ assert_raises(TypeError, lambda: (0).__round__(None))
 assert_raises(TypeError, lambda: (1).__round__(None))
 assert_raises(TypeError, lambda: (0).__round__(0.0))
 assert_raises(TypeError, lambda: (1).__round__(0.0))
+
+assert 00 == 0
+assert 0_0 == 0
+assert 03.2 == 3.2
+assert 3+02j == 3+2j
+
+# Invalid syntax:
+src = """
+b = 02
+"""
+
+with assert_raises(SyntaxError):
+    exec(src)
+
+# Invalid syntax:
+src = """
+b = 03 + 2j
+"""
+
+with assert_raises(SyntaxError):
+    exec(src)