+ (( i=0 ))
+ (( i<=5 ))
+ x=0
+ (( i++  ))
+ (( i<=5 ))
+ x=0
+ (( i++  ))
+ (( i<=5 ))
+ x=0
+ (( i++  ))
+ (( i<=5 ))
+ x=0
+ (( i++  ))
+ (( i<=5 ))
+ x=0
+ (( i++  ))
+ (( i<=5 ))
+ x=0
+ (( i++  ))
+ (( i<=5 ))
+ for i in 0 1 2
+ x=i
+ for i in 0 1 2
+ x=i
+ for i in 0 1 2
+ x=i
+ case x in
+ x=i
+ foo=one
+ foo+=two
+ echo onetwo
onetwo
+ set +x
1
2
3
4
+ for f in a b c d e
+ echo a
a
+ for f in a b c d e
+ echo b
b
+ for f in a b c d e
+ echo c
c
+ for f in a b c d e
+ echo d
d
+ for f in a b c d e
+ echo e
e
+ set +x
TRACEFILE:
+ echo 1
+ echo 2
+ echo 3
+ echo 4
+ unset BASH_XTRACEFD
=====