[New-bugs-announce] [issue28549] curses: calling addch() with an 1-length str segfaults with ncurses6 compiled with --enable-ext-colors

[Yutao Yuan]

New submission from Yutao Yuan:

When addch() is called with an 1-length str, it is converted into a cchar_t. Ncurses6 adds a new field ext_color to cchar_t if it is enabled at compile time, and it is not initialized here, which causes various problems like segfaults or wrong display of characters.

----------
components: Extension Modules
messages: 279620
nosy: yyt16384
priority: normal
severity: normal
status: open
title: curses: calling addch() with an 1-length str segfaults with ncurses6 compiled with --enable-ext-colors
type: crash
versions: Python 3.4, Python 3.5

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28549>
_______________________________________