[issue17225] JSON decoder reports wrong column number on first line

2013-02-18 Thread Ferdinand Beyer 

New submission from Ferdinand Beyer:

The linecol() function in json/decoder.py computes the line and column numbers 
for a byte offset in a string.  Both numbers are expected to start with 1 (as 
in text editors).

If the position is in the first line, the returned column is off by one (or 
starting with zero):

>>> from json.decoder import linecol
>>> linecol('spam', 0)  # Should be (1, 1)
(1, 0)
>>> linecol('\nspam', 1)
(2, 1)

The problem is the line:

if lineno == 1:
colno = pos

that should read

if lineno == 1:
colno = pos + 1

--
components: Library (Lib)
messages: 182320
nosy: fbeyer
priority: normal
severity: normal
status: open
title: JSON decoder reports wrong column number on first line
type: behavior
versions: Python 2.6, Python 2.7, Python 3.1, Python 3.2, Python 3.3, Python 
3.4, Python 3.5

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[issue17225] JSON decoder reports wrong column number on first line

2013-02-21 Thread Ferdinand Beyer 

Ferdinand Beyer added the comment:

Line and column number are included in the formatted error message ("raise 
ValueError(errormsg(...))").  They are currently not accessible separately as 
exception arguments.

--

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