On Mon, Dec 29, 2025, at 22:44, Derrick Stolee via GitGitGadget wrote:

From: Derrick Stolee <redacted>

[snip]
The more elaborate explanation is that within diffcore_std(), we may
skip the initial prefetch due to the output format (--name-only in the
test) and go straight to diffcore_skip_stat_unmatch(). In that method,
the index entries that have been invalidated by path changes show up as
entries but may be deleted because they are not actually content diffs
and only newer timestamps than expected. As those entries are deleted,
later entries are checked with diff_filespec_check_stat_unmatch(), which
uses diff_queued_diff_prefetch() as the missing_object_cb in its diff
options. That can trigger downloading missing objects if the appropriate
scenario occurs to trigger a call to diff_popoulate_filespec(). It's

s/diff_popoulate_filespec/diff_populate_filespec/

finally within that callback to diff_queued_diff_prefetch() that the
segfault occurs.

[snip]