Description
Bug report
Bug description:
I compiled Python 3.13 (commit d86b494, the current tip of the 3.13 branch), and installed it into ~/opt/python313. When I run python3.13 with no arguments, I get this:
Python 3.13.0b1+ (heads/3.13:d86b494117, May 9 2024, 15:23:21) [GCC 13.2.0] on linux Type "help", "copyright", "credits" or "license" for more information. Traceback (most recent call last): File "<frozen runpy>", line 198, in _run_module_as_main File "<frozen runpy>", line 88, in _run_code File "/home/mg/opt/python313/lib/python3.13/_pyrepl/__main__.py", line 47, in <module> interactive_console() ~~~~~~~~~~~~~~~~~~~^^ File "/home/mg/opt/python313/lib/python3.13/_pyrepl/__main__.py", line 44, in interactive_console return run_interactive(mainmodule) File "/home/mg/opt/python313/lib/python3.13/_pyrepl/simple_interact.py", line 138, in run_multiline_interactive_console statement, contains_pasted_code = multiline_input(more_lines, ps1, ps2) ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^ File "/home/mg/opt/python313/lib/python3.13/_pyrepl/readline.py", line 301, in multiline_input return reader.readline(), reader.was_paste_mode_activated ~~~~~~~~~~~~~~~^^ File "/home/mg/opt/python313/lib/python3.13/_pyrepl/reader.py", line 646, in readline self.prepare() ~~~~~~~~~~~~^^ File "/home/mg/opt/python313/lib/python3.13/_pyrepl/historical_reader.py", line 285, in prepare super().prepare() ~~~~~~~~~~~~~~~^^ File "/home/mg/opt/python313/lib/python3.13/_pyrepl/reader.py", line 521, in prepare self.calc_screen() ~~~~~~~~~~~~~~~~^^ File "/home/mg/opt/python313/lib/python3.13/_pyrepl/completing_reader.py", line 259, in calc_screen screen = super().calc_screen() File "/home/mg/opt/python313/lib/python3.13/_pyrepl/reader.py", line 299, in calc_screen self.cxy = self.pos2xy() ~~~~~~~~~~~^^ File "/home/mg/opt/python313/lib/python3.13/_pyrepl/reader.py", line 474, in pos2xy p, l2 = self.screeninfo[y] ~~~~~~~~~~~~~~~^^^ IndexError: list index out of rangeand it exits with status code 1.
My terminal is currently 126 columns by 45 lines, and I have a custom PYTHONSTARTUP environment file pointing to ~/.python, which you can see in this GH repo. It sets up some conveniences for the old REPL (colorful prompt, rlcompleter-based tab-completion, persistent readline history).
Running PYTHONSTARTUP= python3.13 fixes the IndexError.
By commenting out bits of the file I can reproduce the IndexError with just this:
import sys sys.ps1 = '\001\033[0;32m\002>>> \001\033[0m\002' del sysThe \001/\002 characters are hints for readline to inform it that everything between them is a terminal escape sequence that doesn't advance the cursor, without which readline cannot correctly compute the width of the prompt and makes wrong assumptions about line wrapping.
The IndexError goes away if I remove all \001 and \002 characters from sys.ps1.
CPython versions tested on:
3.13
Operating systems tested on:
Linux