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Check that list_size value is not zero before division
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@ -257,7 +257,8 @@ function random_emoji() {
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else
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names=(${=emoji_groups[$group]})
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fi
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local list_size=$#names
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local list_size=${#names}
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[[ $list_size -eq 0 ]] && return 1
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local random_index=$(( ( RANDOM % $list_size ) + 1 ))
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local name=${names[$random_index]}
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echo ${emoji[$name]}
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