A debug class has started

[H. S. Teoh]

On Mon, Dec 13, 2021 at 08:58:42PM +0000, forkit via Digitalmars-d-learn wrote:
[...]
> immutable(char)[] replaceChar(char* str, ulong len, char ch1, char ch2)
> {
>     for (ulong i = 0; i < len; i++)
>     {
>         if (str[i] == ch1)
>         {
>             writefln("Found %c at str[%d]", ch1, i); // fine
>             str[i] = ch2;
>         }
>     }
>     return to!(immutable(char)[])(str);

This line is your problem:  you have a raw pointer `str` and
force-casting it to an array without specifying its length. Do not
expect anything good to come of this. (In fact I'm surprised it .to even
accepts such a thing!)

What you should be doing is:

	return to!string(str[0 .. len]);

Or just:

	return str[0 .. len].idup;


T

-- 
Being forced to write comments actually improves code, because it is easier to fix a crock than to explain it. -- G. Steele