GIT_CONFIG_GLOBAL=/dev/null and GIT_CONFIG_NOSYSTEM=1 in run_git were
witnessed by a config excludesFile, which vwjj's -c
core.excludesFile=/dev/null outranks. So dropping either line passed
every test from vwjj onwards.
The hostile child's config, read as both GIT_CONFIG_GLOBAL and
GIT_CONFIG_SYSTEM, now also sets core.sharedRepository = nonsense.
Measured on git 2.55: git init and git add die on it, git ls-files
does not read it (so the walk, which does not null the user's config,
is unaffected), and run_git passes no -c for it. init.defaultObjectFormat
and init.defaultRefFormat were tried first; they only warn.
Dropping either env line is now red. Every other rival in the combined
test is unchanged, and there is still one child per test.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VdfEGXA7aJ6ftMsCc9PJze
Edward Langley
12a92a8669