[Breakage] 2.20.0-rc0 t1404: test_i18ngrep reports 1 instead of 0 on NonStop in one case

Hi All,

I tracked down a breakage in t1404 subtest 52. The line

test_i18ngrep "Unable to create $Q.*packed-refs.lock$Q: File exists" err

is correctly working, but is reporting a completion 1.

The verbose output, with diagnostics, is:

error: 'grep Unable to create '.*packed-refs.lock': File exists err' didn't find a match in: error: Unable to create '/home/git/git/t/trash directory.t1404-update-ref-errors/.git/packed-refs.lock': File already exists.

Another git process seems to be running in this repository, e.g. an editor opened by 'git commit'. Please make sure all processes are terminated then try again. If it still fails, a git process may have crashed in this repository earlier: remove the file manually to continue.

Reported 1 from test_i18ngrep

err contains (without the double quotes): "error: Unable to create '/home/git/git/t/trash directory.t1404-update-ref-errors/.git/packed-refs.lock': File already exists.

Another git process seems to be running in this repository, e.g. an editor opened by 'git commit'. Please make sure all processes are terminated then try again. If it still fails, a git process may have crashed in this repository earlier: remove the file manually to continue."

Which means that 

! test_have_prereq C_LOCALE_OUTPUT || test_cmp "$@"

is completing with a 1. Is that the intent? Any clues?

Thanks, Randall