I frequently get an error message while performing commits from the GIT GUI, which says:
child process exited abnormally
child process exited abnormally
while executing
"close $fd_ot"
(procedure "commit_committree" line 24)
invoked from within
"commit_committree file228463e6830 6bab594ce....2a2487cd70bdb32 .git/GITGUI_EDITMSG"