Git for Windows 2.54 reports the same partial-clone pack-objects BUG()
without the POSIX 'pack-objects died of signal 6' line (#124293 field
evidence): the BUG assertion is followed directly by 'fatal: could not
finish pack-objects to repack local links' and 'fatal: index-pack failed'.
The recognizer demanded the signal wording, so the recovery retry missed
this Windows occurrence entirely.
Require the BUG fingerprint plus EITHER terminator of the same abort —
the POSIX signal line or the Windows repack fatal — and pin both stderr
shapes plus a fingerprint-without-terminator negative in the regression.
ffa8817345