From 025eb98dc0c1dc27404df6c544fc2944e0fa9f3a Mon Sep 17 00:00:00 2001
From: Ammar Askar <ammar_askar@hotmail.com>
Date: Mon, 24 Sep 2018 17:12:49 -0400
Subject: bpo-34683: Make SyntaxError column offsets consistently 1-indexed
 (gh-9338)

Also point to start of tokens in parsing errors.

Fixes bpo-34683
---
 Python/ast.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'Python/ast.c')

diff --git a/Python/ast.c b/Python/ast.c
index b93eb88dae..b2fcb21975 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -683,7 +683,7 @@ ast_error(struct compiling *c, const node *n, const char *errmsg)
         Py_INCREF(Py_None);
         loc = Py_None;
     }
-    tmp = Py_BuildValue("(OiiN)", c->c_filename, LINENO(n), n->n_col_offset, loc);
+    tmp = Py_BuildValue("(OiiN)", c->c_filename, LINENO(n), n->n_col_offset + 1, loc);
     if (!tmp)
         return 0;
     errstr = PyUnicode_FromString(errmsg);
-- 
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