[Possible Bug] Commit generates GC repack failure

Hi All,

I'm trying to track down what happened this morning. We had a commit that caused a background gc to occur. What happened was:

$ git commit -m "history commit ... " Auto packing the repository in background for optimum performance. See "git help gc" for manual housekeeping. warning: The last gc run reported the following. Please correct the root cause and remove .git/gc.log. Automatic cleanup will not be performed until the file is removed.

fatal: open /dev/null failed: Invalid function argument fatal: failed to run repack

Obviously the /dev/null open was not right, but I don't know where this is in the git code to investigate further. Any pointers on where to look would be appreciated. This started happening at 2.20.1 on the NonStop platform.

Cheers, Randall

-- Brief whoami:
 NonStop developer since approximately 211288444200000000
 UNIX developer since approximately 421664400
-- In my real life, I talk too much.