问C函数中的SIGSEGV

EN

char  *text = "Liquorice gummies macaroon";

char *sort(char *text) {

    int length = strlen(text);
    char *sortString = text;

    if (length >1){
        shell_sort(sortString, length);
        return sortString;
    } else if(length == 1) {
        return text;
    }
}

void shell_sort(char *text, int size) {

    int gap, temp, i , j;

    for (gap = size/2; gap > 0; gap /= 2) {

        for (i = gap; i<size; i++) {
            temp = text[i];

            for (j = i; j >= gap ;j-=gap) {
                if (temp < text[j-gap]) {
                    text[j] = text[j-gap];
                } else {
                    break;
                }
            }
            text[j] = temp;
        }
    }
}