Hi all,

AddressSanitizer is throwing an access-violation error - I've managed to boil it down to this example:

```d
import std.stdio;

class example: Exception {
this(string msg, string file = __FILE__, size_t line = __LINE__) {
                super(msg, file, line);
        }
}

class test {
        this() {                
                throw new example("this is a test");
        }
}

void main() {
        try {
                auto t = new test();
        } catch (example e) {
                writeln(e.msg);
        }
}
```

Compiled with:
ldc2.exe -g -fsanitize='address' .\test.d -of='test.exe'

The error is flagged on the writeln(e.msg). Do I need to do something special to pass a string to an exception? dup?

Kind regards,
Mike Brown

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