t0005 failing with ksh93 on linux

Hi,

I can’t seem to get test-sigchain to run with ksh93 on linux:

 $ ksh
 
 ksh>$ ../bin-wrappers/test-sigchain 
 three
 two
 one
 Terminated
 ksh>$ echo $?
 271
 ksh>$ exit
 $ ../bin-wrappers/test-sigchain 
 three
 two
 one
 Terminated
 $ echo $?
 143

As a result, t0005-signals.sh fails when run through that shell. Ideas?

$ ksh t0005-signals.sh  -v
Initialized empty Git repository in /dev/shm/alt-git/t/trash directory.t0005-signals/.git/
expecting success: 
[...]
        test_cmp expect actual

not ok - 1 sigchain works
[...]
$ git describe
v1.7.2-rc2
$ ksh --version
  version         sh (AT&T Research) 93s+ 2008-01-31
$ uname -s -r -m
Linux 2.6.26-2-686-bigmem i686