Does the shell associated index subscript have a limit on strings?

#!/bin/sh
if [[$#! = 1]];
Then
echo $ basepath;
echo;
Fi

path=$1;

Declare-a Statearray;

(Find $path-type f-print) | while read line;
Do
#echo "----"
echo $line;
#echo "----"
ftype= ' File-b "$line";
Ftype= ' echo ' $ftype | Cut-f 1-d "";
echo "$ftype";

Let statearray["$ftype"]++;

Done;

For type in "${!statearray[@]}";
Do
echo $type: ${statearray["$type"]};
Done

First, the function of the script:

Number of file types in the statistics directory

Problems occurred

ISO-8859 file types cannot be counted

Appear

Statearray:bad Array Subscript Error

To look at some documents, but did not find that the shell array in the correlation array subscript has strict restrictions, generally speaking is a string;

Test

Found

array["ISO-8859"]=1

bash:array["ISO-8859"]: Bad array subscript

But "ISO-8859" is also a string

So I still have some doubts! Ask Daniel again tomorrow.