The exec builtin should return an exit status of 127 if the command
can't be found. It doesn't: it returns 2.
If the command builtin is used to source a script that runs a second
script that doesn't exist ash should issue an error. Instead it seg
faults.
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
