The following script with debug option set -e -v fails at the increment operator only when the variable has a prior value of zero.

#!/bin/bash
set -e -v
i=1; let i++; echo "I am still here"
i=0; let i++; echo "I am still here"

i=0; ((i++)); echo "I am still here"

bash (GNU bash, version 4.0.33(1)-release (x86_64-apple-darwin10) but also GNU bash, version 4.2.4(1)-release (x86_64-unknown-linux-gnu))

Any ideas?

bash shell set operator-keyword increment
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