Description:

Python's readline segfaults always after pressing the ESC key three times. This applies to all raw_input() calls when the readline module is imported (I enable tab completition with a $PYTHONSTARTUP script). Side note, "raw_input()" is a function to get keyboard input, while "input()" is a function to evaluate commands! That will change in py3k, but right now the name doesn't describe its functionality.

Tested in GNU Screen on xfce terminal, clean xterm, clean tty. Other "readlines" i've tested, bash and gdb, don't segfault


$ gdb python
GNU gdb 6.7.1
...
This GDB was configured as "i686-pc-linux-gnu"...
...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) run -c 'import readline; raw_input()'
Starting program: /usr/bin/python -c 'import readline; raw_input()'
(no debugging symbols found)
...
[Thread debugging using libthread_db enabled]
...
[New Thread 0xb7cfd6c0 (LWP 8849)]
...

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb7cfd6c0 (LWP 8849)]
0xb7af2791 in rl_callback_read_char () from /lib/libreadline.so.5
(gdb) bt
#0 0xb7af2791 in rl_callback_read_char () from /lib/libreadline.so.5
#1 0xb7b048b5 in call_readline ()
from /usr/lib/python2.5/lib-dynload/readline.so
#2 0xb7e9d068 in PyOS_Readline () from /usr/lib/libpython2.5.so.1.0
#3 0xb7f17ecb in builtin_raw_input () from /usr/lib/libpython2.5.so.1.0
#4 0xb7ed538a in PyCFunction_Call () from /usr/lib/libpython2.5.so.1.0
#5 0xb7f22c5c in PyEval_EvalFrameEx () from /usr/lib/libpython2.5.so.1.0
#6 0xb7f240fb in PyEval_EvalCodeEx () from /usr/lib/libpython2.5.so.1.0
#7 0xb7f24253 in PyEval_EvalCode () from /usr/lib/libpython2.5.so.1.0
#8 0xb7f44a5c in PyRun_StringFlags () from /usr/lib/libpython2.5.so.1.0
#9 0xb7f45d03 in PyRun_SimpleStringFlags () from /usr/lib/libpython2.5.so.1.0
#10 0xb7f50385 in Py_Main () from /usr/lib/libpython2.5.so.1.0
#11 0x080485f2 in main ()



Additional info:
python 2.5.1-3
readline 5.2-6


Steps to reproduce:
1. python -c 'import readline; raw_input()'
2. Three times ESC

Without the "import readline" it just displays control codes.