EXC_BAD_ACCESS when using strcpy()?

Question

Why calling unAnnoyWord(char *str) with the following input: "hakuna matata" returns:

Exception EXC_BAD_ACCESS (code=2, address=0x10dbc9fa8)

#define RANGE 128
char annoying(char *str)
{
    char occurences[RANGE] = { 0 }; char mostAnnoying = '\0';
    do {
        if (++occurences[*str] > occurences[mostAnnoying])
            mostAnnoying = *str;
    }
    while (*str++);
    return mostAnnoying;
}


void unAnnoyWord(char *str) {
    int i=0;
    char *out = malloc(sizeof(char)*(strlen(str)+1)), mostAnnoying = annoying(str);
    do
    {
        if (*str != mostAnnoying)
        {
            out[i++] = *str;
        }
    } while (*str++);
    out[i]='\0';
    strcpy(str,out);
}

After debugging my code I can confirm that this line causes the issue:

strcpy(str,out);

in main() I have:

char* str="hakuna matata";
unAnnoyWord(str);

---

Edited version:

int i=0,j=0;
char *out = malloc(sizeof(char)*(strlen(str)+1)), mostAnnoying = annoying(str);
do
{
    if (str[j] != mostAnnoying)
    {
        out[i++] = str[j];
    }
} while (str[j++]);
out[i]='\0';
strcpy(str,out);

Answer 1

Why calling unAnnoyWord(char *str) with the following input: "hakuna matata" returns:

Exception EXC_BAD_ACCESS (code=2, address=0x10dbc9fa8)

#define RANGE 128
char annoying(char *str)
{
    char occurences[RANGE] = { 0 }; char mostAnnoying = '\0';
    do {
        if (++occurences[*str] > occurences[mostAnnoying])
            mostAnnoying = *str;
    }
    while (*str++);
    return mostAnnoying;
}


void unAnnoyWord(char *str) {
    int i=0;
    char *out = malloc(sizeof(char)*(strlen(str)+1)), mostAnnoying = annoying(str);
    do
    {
        if (*str != mostAnnoying)
        {
            out[i++] = *str;
        }
    } while (*str++);
    out[i]='\0';
    strcpy(str,out);
}

After debugging my code I can confirm that this line causes the issue:

strcpy(str,out);

in main() I have:

char* str="hakuna matata";
unAnnoyWord(str);

---

Edited version:

int i=0,j=0;
char *out = malloc(sizeof(char)*(strlen(str)+1)), mostAnnoying = annoying(str);
do
{
    if (str[j] != mostAnnoying)
    {
        out[i++] = str[j];
    }
} while (str[j++]);
out[i]='\0';
strcpy(str,out);

Answer 2

Why calling unAnnoyWord(char *str) with the following input: "hakuna matata" returns:

Exception EXC_BAD_ACCESS (code=2, address=0x10dbc9fa8)

#define RANGE 128
char annoying(char *str)
{
    char occurences[RANGE] = { 0 }; char mostAnnoying = '\0';
    do {
        if (++occurences[*str] > occurences[mostAnnoying])
            mostAnnoying = *str;
    }
    while (*str++);
    return mostAnnoying;
}


void unAnnoyWord(char *str) {
    int i=0;
    char *out = malloc(sizeof(char)*(strlen(str)+1)), mostAnnoying = annoying(str);
    do
    {
        if (*str != mostAnnoying)
        {
            out[i++] = *str;
        }
    } while (*str++);
    out[i]='\0';
    strcpy(str,out);
}

After debugging my code I can confirm that this line causes the issue:

strcpy(str,out);

in main() I have:

char* str="hakuna matata";
unAnnoyWord(str);

---

Edited version:

int i=0,j=0;
char *out = malloc(sizeof(char)*(strlen(str)+1)), mostAnnoying = annoying(str);
do
{
    if (str[j] != mostAnnoying)
    {
        out[i++] = str[j];
    }
} while (str[j++]);
out[i]='\0';
strcpy(str,out);

Answer 3

Why calling unAnnoyWord(char *str) with the following input: "hakuna matata" returns:

Exception EXC_BAD_ACCESS (code=2, address=0x10dbc9fa8)

#define RANGE 128
char annoying(char *str)
{
    char occurences[RANGE] = { 0 }; char mostAnnoying = '\0';
    do {
        if (++occurences[*str] > occurences[mostAnnoying])
            mostAnnoying = *str;
    }
    while (*str++);
    return mostAnnoying;
}


void unAnnoyWord(char *str) {
    int i=0;
    char *out = malloc(sizeof(char)*(strlen(str)+1)), mostAnnoying = annoying(str);
    do
    {
        if (*str != mostAnnoying)
        {
            out[i++] = *str;
        }
    } while (*str++);
    out[i]='\0';
    strcpy(str,out);
}

After debugging my code I can confirm that this line causes the issue:

strcpy(str,out);

in main() I have:

char* str="hakuna matata";
unAnnoyWord(str);

---

Edited version:

int i=0,j=0;
char *out = malloc(sizeof(char)*(strlen(str)+1)), mostAnnoying = annoying(str);
do
{
    if (str[j] != mostAnnoying)
    {
        out[i++] = str[j];
    }
} while (str[j++]);
out[i]='\0';
strcpy(str,out);