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Description
Bug description
While researching a personal project bug, I made a typo in the REPL. Obviously, one shouldn't do like the following distilledMRE, but a crash is a crash so reporting it:
$python3.13Python 3.13.1 (main, Dec 12 2024, 16:35:44) [GCC 11.4.0] on linuxType "help", "copyright", "credits" or "license" for more information.>>> import os>>> os.environ = []Traceback (most recent call last): File "<frozen runpy>", line 198, in _run_module_as_main File "<frozen runpy>", line 88, in _run_code File ".../.local/Python3.13.1/lib/python3.13/_pyrepl/__main__.py", line 6, in <module> __pyrepl_interactive_console() File ".../.local/Python3.13.1/lib/python3.13/_pyrepl/main.py", line 59, in interactive_console run_multiline_interactive_console(console) File ".../local/Python3.13.1/lib/python3.13/_pyrepl/simple_interact.py", line 151, in run_multiline_interactive_console statement = multiline_input(more_lines, ps1, ps2) File ".../local/Python3.13.1/lib/python3.13/_pyrepl/readline.py", line 389, in multiline_input return reader.readline() File ".../local/Python3.13.1/lib/python3.13/_pyrepl/reader.py", line 795, in readline self.prepare() File ".../local/Python3.13.1/lib/python3.13/_pyrepl/historical_reader.py", line 302, in prepare super().prepare() File ".../local/Python3.13.1/lib/python3.13/_pyrepl/reader.py", line 635, in prepare self.console.prepare() File ".../local/Python3.13.1/lib/python3.13/_pyrepl/unix_console.py", line 349, in prepare self.height, self.width = self.getheightwidth() File ".../local/Python3.13.1/lib/python3.13/_pyrepl/unix_console.py", line 451, in getheightwidth return int(os.environ["LINES"]), int(os.environ["COLUMNS"])TypeError: list indices must be integers or slices, not str$echo$?1
This is clearly a PEBCAK interaction; the proper way to have cleared the environment would have been.clear() (and as an education point and/or reminder for search engine retrieval or others reading this later,os.environ andos.environb are "special" in that they're assumed to exist and are linked — a change to one affects the other).
But, my late-night typo did produce an interpreter crash, so reporting here.
Note that this does not appear to fail in Python up to v3.12. Python 3.13 is the first to crash this way.
Background
I initially thought it was an IPython bug, andso reported it there.@Carreau rightly course-corrected me, with a suggestion for a possible upstream fix in CPython.
CPython versions tested on:
3.13
Operating systems tested on:
Linux