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[3.13] gh-128636: Fix crash in PyREPL when os.environ is overwritten with an invalid value for macOS (GH-138089) (GH-138942)

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Signed-off-by: yihong0618 <zouzou0208@gmail.com>
Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>

(cherry picked from commit 8ef7735c53)
This commit is contained in:
Łukasz Langa 2025-09-15 23:53:51 +01:00 • committed by GitHub
parent d8b3a83cf2
commit 3669efb890
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GPG key ID: B5690EEEBB952194
5 changed files with 31 additions and 8 deletions
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18
Lib/_colorize.py
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@ -77,21 +77,29 @@ def get_colors(
def can_colorize(*, file: IO[str] | IO[bytes] | None = None) -> bool:
def _safe_getenv(k: str, fallback: str | None = None) -> str | None:
"""Exception-safe environment retrieval. See gh-128636."""
try:
return os.environ.get(k, fallback)
except Exception:
return fallback
if file is None:
file = sys.stdout
if not sys.flags.ignore_environment:
if os.environ.get("PYTHON_COLORS") == "0":
if _safe_getenv("PYTHON_COLORS") == "0":
return False
if os.environ.get("PYTHON_COLORS") == "1":
if _safe_getenv("PYTHON_COLORS") == "1":
return True
if os.environ.get("NO_COLOR"):
if _safe_getenv("NO_COLOR"):
return False
if not COLORIZE:
return False
if os.environ.get("FORCE_COLOR"):
if _safe_getenv("FORCE_COLOR"):
return True
if os.environ.get("TERM") == "dumb":
if _safe_getenv("TERM") == "dumb":
return False
if not hasattr(file, "fileno"):