[New-bugs-announce] [issue3975] PyTraceBack_Print() doesn't respect # coding: xxx header

[STINNER Victor]

New submission from STINNER Victor <victor.stinner at haypocalc.com>:

PyTraceBack_Print() doesn't take care of the "# coding: xxx" header of 
a Python script. It calls _Py_DisplaySourceLine() which opens the file 
as a byte stream (and not an unicode characters stream). Because of 
this problem, the traceback maybe truncated or invalid. Example (write 
it into a file and execute the file):
----
from sys import executable
from os import execvpe
filename = "pouet.py"
out = open(filename, "wb")
out.write(b"""# -*- coding: GBK -*-
print("--asc\xA1\xA7i--")
raise Exception("--asc\xA1\xA7i--")""")
out.close()
execvpe(executable, [executable, filename], None)
----

This issue depends on issue2384 (line number).

Note: Python 2.6 may also has the problem but it doesn't parse "# 
coding: GBK". So it's a different problem (issue?).

----------
messages: 73851
nosy: haypo
severity: normal
status: open
title: PyTraceBack_Print() doesn't respect # coding: xxx header
versions: Python 3.0

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3975>
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