crash

cy@blackshit:~$ for i in {1..5}; do xyz & echo & echo ${i}: $?; done
[1] 26976
[2] 26977
1: 0

[3] 26978
[4] 26980

2: 0
[5] 26982
[6] 26983
3: 0

[7] 26985
[8] 26986
4: 0

[9] 26988
[10] 26989

5: 0
[2]   Done                    echo
[4]   Done                    echo
[6]   Done                    echo
[8]   Done                    echo
cy@blackshit:~$ No command 'xyz' found, did you mean:
 Command 'xye' from package 'xye' (universe)
 Command 'xz' from package 'xz-utils' (main)
xyz: command not found
No command 'xyz' found, did you mean:
 Command 'xz' from package 'xz-utils' (main)
 Command 'xye' from package 'xye' (universe)
xyz: command not found
No command 'xyz' found, did you mean:
 Command 'xz' from package 'xz-utils' (main)
 Command 'xye' from package 'xye' (universe)
xyz: command not found
[2]   Done                    echo
[4]   Done                    echo
No command 'xyz' found, did you mean:
 Command 'xye' from package 'xye' (universe)
 Command 'xz' from package 'xz-utils' (main)
xyz: command not found
No command 'xyz' found, did you mean:
 Command 'xz' from package 'xz-utils' (main)
 Command 'xye' from package 'xye' (universe)
xyz: command not found
[2]   Done                    echo
[4]   Done                    echo
[6]   Done                    echo
[2]   Done                    echo

[1]   Exit 127                xyz
[3]   Exit 127                xyz
[5]   Exit 127                xyz
[7]   Exit 127                xyz
[9]-  Exit 127                xyz
[10]+  Done                    echo
cy@blackshit:~$